We just released two big projects we have been working on for quite a while.
Mono 2.4 is a much faster, scalable and tuned version of Mono, like you have never seen before. Major highlights from the previous release are documented in our release notes.
And MonoDevelop 2.0
And a brand new web site
I previously blogged about the list of all the new MonoDevelop 2.0 features. The most visible one is the integrated debugger both for Mono applications and for C-based applications (using GDB).
Dogfooding: In addition to all the nice features in MonoDevelop 2.0, Lluis migrated the web site for MonoDevelop from MediaWiki to the Mono-powered MindTouch Deki content management system.