"IronMonkey, the project to map IronPython and IronRuby to Tamarin, so that Tamarin becomes multi-lingual, over time delivering high performance for all languages."

Wow, a major open source project using Microsoft code - who'd have thought that was possible. Good to see a project with some sense, and not just an attitude.

"ScreamingMonkey, the project to add browser-specific script-engine glue to Tamarin, enabling it as a <script> tag handler in other browsers, starting with IE."

This is pretty cool, a single JS engine over different browsers. One issue down, CSS and rendering to go.