I've posted a list of sessions with openings at the SES San Jose 2007 conference. The openings are listed about midway down this post of guidelines—please read the guidelines before sending a pitch.
UPDATE: All speaking openings have been filled for SES San Jose. I'm in the process of getting back to everyone who pitched; please wait until the end of next week to contact me if you haven't heard anything by then.
SES Denver (Oct 16) offers an intense day of learning all the critical aspects of search engine optimization (SEO) and paid search advertising (PPC). The mission of SES remains the same as it did from the start - to help you master being found on search engines. Early Bird rates available through Sept 12. Register today!