Mono 2.0 has been released. It is a major release with a lot of bug fixes and new features. The main changes are the compiler upgrade to C# 3.0 with LINQ and the inclussion 2.0 version of ADO.NET, ASP.NET and System.Windows.Forms, which is more than enough for a 2.0 release. Please, go to Mono site to read more.
With this release, I hope Mono could attract a lot of new contributors and enterprises that depend on .NET and want to migrate their systems to Linux.
I encourage any .NET developer to try Mono 2.0, it has the actual heart of multiplatform and multilanguage development. Moreover, this release should be included in any Linux distribution, I hope this release is in time to be included in Ubuntu 8.10 (Intrepid Ibex) and soon to be backported to other distributions that has been released yet (Thanks Meebey to always let us have Mono in Ubuntu & Debian so soon after their release).