This year's Google I/O will play host to a number of sessions and events aimed specifically at helping Software as a Service companies integrate with and monetize Google Apps, including:
Plus:
We are planning several more sessions that we'll be announcing in the coming weeks that you won't want to miss. We'll also be hosting a mixer event just for the enterprise developer community that'll take place just before the After Hours party at I/O.

Google I/O is our biggest developer event of the year, and it's also the best chance you'll get to learn about the technologies that can help you build a thriving business extending Google Apps. We hope you'll
register today!

Posted by Scott McMullan, Google Apps Partner Lead