Here's an interesting read on Dalvik. The 'iphone hate' in the last paragraph made me laugh out loud as it comes out of nowhere!
http://www.betaversion.org/~stefano/linotype/news/110/

And here's a link to the wikipedia entry on Dalvik:
http://en.wikipedia.org/wiki/Dalvik_virtual_machine

A good read!

Here's a talk by the creator of Dalvik:
http://sites.google.com/site/io/dalvik-vm-internals

}:^)~