It may be worth noting that the upcoming link seems seems to suggest that the Dalvik VM garbage collector may be fully able to a) run on a separate thread/core, and b) run concurrently with the application:

http://stackoverflow.com/questions/4...bage-collector

The Dalvik project is quite interesting, and I'm looking forward to seeing where it goes.

I would rather see that Dalvik became a generalized LLVM implementation (if it isn't already) and bytecode compiled to LLVM bitcode to open the floodgates for freedom for the developer to choose language without compromising architecture independence.

Currently Android's Renderscript (a C99 language) compiles to LLVM bitcode, and then is natively compiled on first-run/install and the resultant executable cached for future runs. This method is fast (native), portable (LLVM), and gives freedom to the developer to choose language. I would like to see this extend beyond renderscript to the general development platform.