There is a gentlemen that is known from the Droid Community and is claiming that he has a partial Root and has overclocked his friends Droid to 1.5ghz and is working on a 2ghz kernel
http://www.ninebysix.com/post.cfm/htc-incredible-overclocked-to-1-5-ghz-next-step-2-0-ghz
http://www.ninebysix.com/post.cfm/htc-incredible-overclocked-to-1-5-ghz-next-step-2-0-ghz