Wow, I haven't seen much written about it other than the updated pages on the mono-project.com website and some tweets from Miguel de lcaza, but finally Mono 2.8 released! This release has some major updates include full C# 4.0 spec, MVC2 (official), and Asp.Net 4.0 mod_mono among a ton of other fixes and enhancements. I'll be writing another blog post today with an updated script to compile/install the 2.8 build on Debian & RedHat distros.
If you have any interest in running your .NET applications with Mono, now is a good time to try it out. With this release, you'll find very little resistance with incompatibilities for .NET 2.0-3.5. You still use Visual Studio for builds, and you can even take advantage of a huge extension framework built-in to mono.