It's impressive to see how rapidly Mono is maturing as a project. With a fairly small
development team, they've implemented the entire ISO/ECMA
specification for the CLI and C#, running on Linux and Windows. They've more or
less completed the fundamentals, and are already working on future C# language features
such as generics and anonymous methods that won't even make it into the Microsoft
.NET Framework until Whidbey. The Mono project also includes an extensive set
of .NET data providers, supporting DB2, Interbase, MySQL and Sybase; many of these
also work with the Microsoft implementation.
Cornell have done a performance
comparison between the JIT execution engines in .NET, Mono and SSCLI (Rotor),
and it's clear from both the paper itself and a follow-up
posting by Miguel that they're heading towards the same ballpark. Mono has an
interesting year ahead of it, particularly as people start to use it to build sophisticated
Linux applications in C#...