GBBK Global Blockchain Acquisition Corporation

Fourth graph of release dated April 26, 2007, telephone replay numbers should read: 800-642-1687 or 706-645-9291. The corrected release reads: GREATER BAY BANCORP SCHEDULES FIRST QUARTER 2007 EARNINGS RELEASE AND CONFERENCE CALL Greater Bay Bancorp (Nasdaq:GBBK), a financial services holding company, announced that it will broadcast its earnings conference call live via the Internet on Thursday, May 3, 2007. A press release outlining the first quarter 2007 financial results will be distributed at 3:30 a.m. PDT on May 3, 2007. The conference call will begin at 8:00 a.m. PDT on May 3, 2007 and will last for approximately one hour. Investors have the opportunity to listen to the conference call live over the Internet through the company's website at http://www.gbbk.com, under the "Investor Info." link, or through http://www.earnings.com. Investors should go to either of these websites 15 minutes prior to the start of the call, as it may be necessary to download audio software to hear the conference call. To do so, investors should click on the Windows Media Player icon at the bottom of the page and follow directions from there. A replay of the conference call will be available on the websites. A telephone replay will also be available beginning at 11:00 a.m. PDT on May 3, 2007 through 9 p.m. PDT on May 10, 2007, by dialing 800-642-1687 or 706-645-9291 and providing Conference ID 7624384. About Greater Bay Bancorp Greater Bay Bancorp, a diversified financial services holding company, provides community banking services in the greater San Francisco Bay Area through the Greater Bay Bank, N.A. community banking organization, including Bank of Petaluma, Coast Commercial Bank, Golden Gate Bank, Mid-Peninsula Bank, Mt. Diablo National Bank, Peninsula Bank of Commerce and Santa Clara Valley National Bank. Nationally, Greater Bay Bancorp provides specialized leasing and loan services through its specialty finance group, which includes Matsco, CAPCO and Greater Bay Capital. ABD Insurance and Financial Services, the Company's insurance brokerage subsidiary, provides commercial insurance brokerage, employee benefits consulting and risk management solutions to business clients throughout the United States. For additional information and press releases about Greater Bay Bancorp, visit the Company's web site at http://www.gbbk.com. Safe Harbor This document may contain forward-looking statements that are subject to risks and uncertainties that could cause actual results to differ materially from those projected. For a discussion of factors that could cause actual results to differ, please see the publicly available Securities and Exchange Commission filings of Greater Bay Bancorp, including its Annual Report on Form 10-K for the year ended December 31, 2006 and particularly the discussion of risk factors within such documents.