Found this useful site just recently through looking for more information on FoxUnit and other testing architectures. I had never heard of the MSDN Lab site before but now that I have, I’m certainly going to watching it for more hints of what’s to come.
Not a lot of new stuff recently (just the Whidbey beta – but who knows)
Try http://www.foxunit.org/ – saw it at DevEssentials and it looks promising.