Google has announced its Google I/O 2010 to be held in San Francisco May 19-20 at the Moscone Center.
I think this is their third such annual event, and it's always been a full two days of information. The good news is the price is $400 per person (until April 15), a bargain really. The bad news? You'll need to bring four or five people from your company to hit all of the sessions in each track!
This conference is VERY technical, VERY good. You get the most from it if you are a developer, you know Java, Ajax, Python, or the other technologies Google uses in its various products. You won't find much in the way of marketing fluff here: in our experience, most presenters are Google developers.
The conference is being held the same week that Gilbane content management conference comes back to San Francisco. Bad timing for them, but good for you: you can probably walk to the nearby Westin at lunch and maybe catch the exhibits.
Last year, attendees received a free phone for development purposes on the Android OpSys; who knows what they might give away this year - besides the expected cool T-shirt!
Register at https://code.google.com/events/io/2010/.