Required NASDAQ Release by pSivida

pSivida Limited (NASDAQ:PSDV)(ASX:PSD)(Xetra:PSI) today announced that its financial statements for the fiscal year ended June 30, 2007 included in the Company’s Form 20-F filed on October 1, 2007, contain a going concern qualification from its independent accounting firm, Deloitte Touche Tohmatsu. The independent auditor’s opinion noted the Company’s recurring losses from operations and negative cash flows from operations. In July 2007, pSivida raised approximately US$20.6 million through the sale of shares, ADSs and warrants, including a placement of US$6.5 million to Pfizer Inc., the Company’s largest shareholder. This investment and Pfizer's earlier equity investment of US$5 million were made under a collaborative research and licensing agreement that provides for a total of up to US$165 million in equity investments and development and sales-related milestones. The Company expects to receive certain research and development funding from Pfizer under the agreement, commencing in January 2008. The Company is now debt free, having repaid all its outstanding debt during the year ended June 30, 2007. The Company believes that its existing cash resources are sufficient to fund its operations as currently conducted through at least June 30, 2008. This announcement is being made in compliance with Nasdaq Marketplace Rule 4350(b)(1)(B), which requires separate disclosure of receipt of an audit opinion that contains a going concern qualification. This announcement does not represent any change or amendment to the Company's fiscal 2007 financial statements or to its Annual Report on Form 20-F. NOTES TO EDITORS: pSivida is a global drug delivery company committed to the biomedical sector and the development of drug delivery products. Retisert® is FDA approved for the treatment of uveitis. Vitrasert® is FDA approved for the treatment of AIDS-related CMV Retinitis. Bausch & Lomb owns the trademarks Vitrasert® and Retisert®. pSivida has licensed the technologies underlying both of these products to Bausch & Lomb. The technology underlying Medidur™ for diabetic macular edema is licensed to Alimera Sciences and is in Phase III clinical trials. pSivida has a worldwide collaborative research and license agreement with Pfizer Inc. for other ophthalmic applications of the Medidur™ technology. pSivida owns the rights to develop and commercialize a modified form of silicon (porosified or nano-structured silicon) known as BioSilicon™, which has applications in drug delivery, wound healing, orthopedics, and tissue engineering. The most advanced BioSilicon™ product, BrachySil™ delivers a therapeutic, P32 directly to solid tumors and is presently in Phase II clinical trials for the treatment of pancreatic cancer. pSivida’s intellectual property portfolio consists of 71 patent families, 99 granted patents, including patents accepted for issuance, and over 300 patent applications. pSivida conducts its operations from facilities near Boston in the United States, Malvern in the United Kingdom and Perth in Australia. pSivida is listed on NASDAQ (PSDV), the Australian Stock Exchange (PSD) and on the Frankfurt Stock Exchange on the XETRA system (PSI). pSivida is a founding member of the NASDAQ Health Care Index and the Merrill Lynch Nanotechnology Index. Various statements made in this release are forward-looking and involve a number of risks and uncertainties. All statements that address activities, events or developments that we intend, expect or believe may occur in the future are forward-looking statements. The following are some of the factors that could cause actual results to differ materially from the forward-looking statements: the risks that we will not be able to raise additional capital; that we will continue to incur losses and may never become profitable; that we will be required to pay penalties pursuant to registration agreements with securities holders and not have sufficient funds to do so; that we will be unable to develop new products; that we will be unable to protect our own intellectual property or will infringe on others’ intellectual property; that we will not receive regulatory approvals necessary to commercialize products; that we will be unable to secure partners necessary to develop and market products; that our current licensees will terminate their agreements with us; that our competitors’ products will receive regulatory approval before, reach the market before, or otherwise receive better market acceptance than, our product candidates; that our international business operations will result in increased costs or delays; that manufacturing problems will delay product development and commercialization; that third-party reimbursement and health care providers will not cover the costs of our products; that we will fail to retain some or all of our key personnel; we will be subject to product liability suits and not have sufficient insurance to cover damages; that we will fail to effectively manage changes in our business; that we will fail to comply with environmental laws and regulations; that we will fail to achieve and maintain effective internal control over financial reporting; that amortization or impairment of other intangibles will adversely affect our operating results; that our being headquartered outside of the United States will make it difficult to effect legal services against us or our management, lead to adverse shareholder tax consequences, or otherwise limit shareholder rights; that we will be delisted from the ASX or NASDAQ; that our expectation to not pay cash dividends will decrease our stock price; that exercise of outstanding warrants and stock options will dilute ownership and reduce stock price; that future stock issuances could dilute ownership, restrict operations, encumber assets, or otherwise cause a decline in stock price; and the risk that Pfizer will influence our business in non-beneficial ways; and other factors that may be described in our filings with the Securities and Exchange Commission. Given these uncertainties, readers are cautioned not to place undue reliance on such forward-looking statements. We do not undertake to publicly update or revise our forward-looking statements even if experience or future changes make it clear that any projected results expressed or implied in such statements will not be realized.