Parrot
Mentioned this before but this VM will form the basis of Perl, Python and maybe more languages. I do intend to target this VM with the compilers I create.
Lots of interesting resources here, the talks and papers caught my eye.
DotGNU and the execution language
The DotGNU project describes how it intends to target several VM's and not just the CLR.
DotGNU C# programming book
This sounds like a great idea, I hope we see programming books for Mono and DotGNU very soon.
Peter returns
Peter Drayton returns to Blogging, welcome back Peter :)