This SDK release makes Morten (that would be me) a happy camper. Now I have something to do when I get home from work! 
Release information
http://googleappengine.blogspot.com/2009/12/app-engine-sdk-130-released-including.html
Why am I looking forward to this? It’s the first time I see a mention of performance updates for dynamic languages in AppEngine. I’m upgrading later to night to see what my actual performance boost is.
The blob service is also a welcomed scenario. We’re using something similar in our REST-API in RemoteX Applications.
