Interesting. Adobe open sourced the virtual machine for ActionScript, the programming language of the Flash 9 player. The Mozilla Foundation has picked it up and started the Tamarin project around the vm, possibly to use it as a JavaScript engine in future versions of Firefox.
What I'm wondering, does this make it easier to target the Flash player from compilers for other languages? For example, could you compile a limited version of Python to this VM? Or a pedagogical language in a compilers class?
Also, this vm might be useful as a restricted execution environment within other languages.