Please register via the official event homepage and an email to lynn at eclipse dot org
Keep in mind that signing up for the event via Upcoming.org does not grant you access to the event - email to Lynn Gayowski and subsequent addition to the Eclipse wiki site is the only and official way to go.
Ian Skerrett made an official announcement for the event via his blog.
Update May 30th, 2008:
The event is filling up pretty fast. The attendee list is limited to 100 people and we've just reached the 91th pre-registration.
If you are an Eclipse developer in any capacity, would like to learn more and located in the Mountain View area, I'd suggest you act fast.
Have a look at the talk agenda and see for yourself what you'd be missing out on.
Official Website: http://wiki.eclipse.org/EclipseDay_At_Googleplex
Added by codesurgeon on May 26, 2008