The big event of the conference was the annoucement of Google Wave, a new online communication and collaboration tool, built on the Google Web Toolkit (GWT). Another big thing the GWT, lots of application built with it, a delightful tool for Java developers.
It was interesting to see that Google App Engine (GAE) will shortly provide an API to do offline processing, with objects called Task Queue. Task queue are web hooks, tasks are pushed to the server, queued and they are pushed until the task is executed (which overpass the annoying well-known time out issue with Google App Engine). It was introduced as asynchronous, enabling low latency, reliable and scalable (where are the buzz words?). Of course, this news has been a huge relief for most of the developers in the public as that was a big missing part from GAE.
An nice presentation from the founders of FrontSeat.org about their current project Walk score. They introduced themselves as civic software developers, writing software in a civic manner. They explained how they use GAE, and why they had to use Amazon EC2 to compensate GAE gaps. The gaps they listed here were the ranking non-ability of GAE, the too long reponse time for such computation they do, the fact that no cron jobs can be done (the arrival of Task Queue might change their opinion).
All the sessions have been recorded and are available here.
And yes, as all the participants of this conference, I went back home with an Android phone :)

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Logilab.org - en