Mobile Multitasking (iPhone vs Android)

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:

http://davidquintana.com/entry/mobile-multitasking
Comparing the models of "multithreading" between Android and iPhone 4.0

http://www.appleinsider.com/articles/10/04/17/inside_iphone_os_4_0_multitasking_vs_mac_os_x_android.html
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.