OK, Visual Studio 2010 is well and truly released, so I thought I'd better catalog what goodness is in the box for all you T4 fans out there..
For template authors:
For custom tool builders:
For DSL Tools users:
Phew, that's a long list - you can see that Visual Studio 2010 is a big release for T4.
I'll come back and edit this post to include live links as I fill in more details about some of these topics.