Equivalent MSBuild/NAnt Tasks
I've just added a new page to the MSBuild Wiki that compares equivalent NAnt and MSBuild tasks. The page contains links to all of the MSBuild and NAnt task documentation I could find. I'm sure there will be some errors or tasks in there that I've missed. It's a Wiki, so please jump in there and fix any mistakes! You'll need to create a Channel9 account before you can start editing.
Alex has added a load of great content already. I have found subscribing to the feed it the best way to consume a Wiki. You can find the MSBuild Wiki feed here. The MSBuild/NAnt task comparison is here.
There is now also an MSBuild aggregated feed that contains posts from the MSBuild team and various people who have an MSBuild category on their blog. As I appear to be the only one subscribed to it at the moment, here's a button, and here's the [rss].