SST Silverstone Resources Com Npv

Silverstone Resources Corp. ("Silverstone") (TSX VENTURE: SST) is pleased to announce that RiskMetrics Group (formerly Institutional Shareholders Services), Canada's leading independent proxy advisory firm, has recommended that its clients holding Silverstone shares, including investment firms, pension funds, mutual funds and other fiduciaries throughout Canada, the U.S. and the world, vote FOR the previously announced proposed acquisition of Silverstone by Silver Wheaton Corp. ("Silver Wheaton") by way of plan of arrangement under the Business Corporations Act (British Columbia).

In making its recommendation, RiskMetrics noted that the exchange ratio provided for under the plan of arrangement is at a premium and that market prices have maintained an upward trend since the announcement of the proposed acquisition on March 12, 2009.

"We are very pleased that, following an independent review, RiskMetrics has recommended that Silverstone shareholders vote FOR the proposed acquisition of Silverstone Resources by Silver Wheaton," said Darren Pylot, President and Chief Executive Officer of Silverstone. "The proposed acquisition would give Silverstone shareholders ownership in the largest silver streaming company in the world, significant trading liquidity and a strong balance sheet."

The plan of arrangement must be approved by not less than two-thirds of the votes cast by shareholders present in person or represented by proxy at the Special Meeting of Silverstone Shareholders scheduled to be held at 2:00 p.m. (Vancouver time) on Tuesday, May 19, 2009 at the offices of Blake, Cassels & Graydon LLP, Suite 2600, Three Bentall Centre, 595 Burrard Street, Vancouver, British Columbia. Shareholders are reminded that the deadline for receiving proxies is 2:00 p.m. (Vancouver time) on May 14, 2009.

Shareholders with questions about the Plan of Arrangement or the process for submitting proxies are encouraged to call Kingsdale Shareholder Services Inc., toll free in North America at 1-866-581-0506 or 1-416-867-2272 outside of North America.

CAUTIONARY NOTE REGARDING FORWARD LOOKING-STATEMENTS

This news release contains certain "forward-looking information" under applicable Canadian and United States securities laws concerning the proposed acquisition of Silverstone by Silver Wheaton. Forward-looking statements are based on the opinions and estimates of management at the date the statements are made, and are based on a number of assumptions and subject to a variety of risks and uncertainties and other factors that could cause actual events or results to differ materially from those projected in the forward-looking statements. Assumptions upon which forward-looking statements related to the proposed acquisition by Silver Wheaton of Silverstone include that the shareholders of Silverstone will approve the plan of arrangement, that all required third party regulatory and governmental approvals to the plan of arrangement will be obtained and all other conditions to completion of the plan of arrangement involving Silver Wheaton and Silverstone will be satisfied or waived. Many of these assumptions are based on factors and events that are not within the control of Silverstone and there is no assurance they will prove to be correct. Silverstone is under no obligation to update forward-looking statements if circumstances or management's estimates or opinions should change except as required by applicable securities laws. The reader is cautioned not to place undue reliance of forward-looking statements.

Permission to cite the recommendation of RiskMetrics was neither sought nor obtained.

Contacts: Silverstone Resources Corp. Mark Patchett Investor Relations (604) 637-8151 or (866) 684-8894 (604) 688-2180 (FAX) info@silverstonecorp.com www.silverstonecorp.com