I am now back from the devsummit in Palm Springs and a really good holiday afterwards in California!

Other people have already summarized the devsummit very well such as:
James Fee
GeoCortex
MapButcher

I wont go through all my notes here since most of that is already covered, but the main thing I take with me from this years conference is that the webADF is now officially dying! From now on (version 10) it is all about the REST API and all their client APIs. In ArcGIS Server 10 you can easily extend the REST API with your own functionality by writing your own SOEs, pretty cool stuff!

ESRI about the webADF:
The webADF is what we consider a mature product at 10. So what we have done for version 10 is to put in the most requested features to finish it off in terms of the feature set. The future is the webAPIs such as Silverlight, Flex and Javascript. The reason for the shift of focus is not just ESRI, its the way the industry is going. We will maintain the webADF and it will be supported but we are not doing active development on the webADF.
(check out the video “Getting More out of Your .NET Web ADF Application” for the whole answer)

Devsummit 2010 Videos:
http://www.esri.com/events/devsummit/videos/index.html (Plenary)
http://www.esri.com/events/devsummit/tech-session-videos/index.html (Sessions)

Me and a mate in the dessert..

Another mate in front of a massive truck, dont get many of them in England..