GBBK Global Blockchain Acquisition Corporation

Greater Bay Bancorp (Nasdaq:GBBK), a financial services holding company, announced that James S. Westfall, Executive Vice President and Chief Financial Officer, will participate in a conference sponsored by Lehman Brothers on September 14, 2006 at 11:45 a.m. EDT. The Lehman Brothers conference will be accessible on-demand through its website at http://customer.talkpoint.com/LEHM002/091206a_ jw/default.asp?entity=greaterbay during the conference and for 90 days following the conference. (Due to its length, this URL may need to be copied/pasted into your Internet browser's address field. Remove the extra space if one exists.) Slides of Greater Bay Bancorp's presentation have been filed with the SEC on a Current Report on Form 8-K. The Form 8-K may be accessed through the Company's website http://www.gbbk.com or the SEC's website http://www.sec.gov. Persons interested in listening to the conference should access the website 15 minutes prior to the start of the conference to register. It may be necessary to download audio software to hear the presentation. 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 website 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, 2005, and particularly the discussion of risk factors within such documents.