Miguel de Icaza has announced the immediate release of Mono 2.11, which brings many changes for this controversial open-source implementation of Microsoft's .NET platform for Linux and other operating systems.
Mono 2.11 has been in development for more than a year and its key features include the SGen garbage collector being considered production quality, full Unicode Surrogate support within the Mono run-time, C# 5.0 a-sync programming support, and the C# compiler back-end has been rewritten into a single mcs compiler.
Additionally, there are improvements to Mono's "Compiler as A Service", a better C# shell, compliance with the .NET 4.5 Profile API, better GDB debugging support, performance improvements, and a port of Mono to the MIPS architecture.
Further information on the Mono 2.11 release can be learned from Miguel's blog
and this new open-source Mono release can be acquired from Mono-Project.com