Project Mono, an effort to create an open source version of the Microsoft Corp. .Net Framework, expects to release version 1.0 of its software this year, probably in the fourth quarter.Also, OpenLink announced the release of a project to turn Wine into a library that can be used dynamically from Mono. This work simplifies the work on System.Windows.Forms as it is no longer necessary have a special version of the GC, nor have a stub program. There is still some work to be done.
Here are some screenshots running GTK# applications.
Elsewhere, dotGNU 0.5.6 was released recently.