I was just chatting with a friend of mine Glenn and he pointed out a couple of really cool resources.

There is a 2 hour course on AJAX.  Don't get me started - I was doing this a long time ago, when it didn't have a cool name like AJAX, now it's the next big thing.  AJAX is great, but like all technologies there's a time and place for everything.  I'll leave that for another post.

http://blogs.msdn.com/gblock/archive/2007/02/23/free-asp-net-ajax-e-learning-just-shipped.aspx

Back in October they released 6 hours on .NET 3.0.  It's 3 courses, 2 hours each, on Windows Presentation Foundation (wpf), Windows Communication Foundation (wcf) and Work Flow (wf).  The e-learning has had over 60,000 activations since its release

http://blogs.msdn.com/gblock/archive/2006/10/24/net-3-0-e-learning.aspx