Since Apple annouced iPhone 4.0 with support for multitasking, discussions about mobile multitasking are getting hot these days. Here I summarize the links to the discussions:
Comparing the models of "multithreading" between Android and iPhone 4.0
An article from an iPhone and Apple supporter. There is also an interesting discussion about unified development tools: Clang, LLVM and Xcode, at the end of this article.