It's been a while, but I think it was worth the wait. Erik has contributed code to allow OpenTK to work under X, and he did a good job at that, too! Plus several other things have been changed (for the better).
So what do we have in this release?
+ Windows and X support. You can set display modes, toggle fullscreen and other nice things. There are some rough edges still, but these will be sorted out later.
+ Updates to the structure of the GL class. Extension functions are now separate from the Core OpenGL functions, which helps discoverability (GL.Ext will bring up a list of all [...]EXT functions - or at least it will in the next version! ;) )
+ New examples for people without shader capable cards (props to Erik again!)
The next version (which should come quite soon) will feature the Return of the Extensions, plus new higher level functionality - probably a DisplayList or a VertexBufferObject class. Or maybe render-to-texture. And (of course) many bug fixes.
May the Source be with you!