Can the IDE level version control support in Visual Studio Express 2012 be used with Git, or would that require plug-in support available only with the full version?
Actually, the selected answer is wrong. Visual Studio Express 2012 supports Microsoft's plugin for Git, as it's actually an extension of Team Foundation. You can find it here: http://visualstudiogallery.msdn.microsoft.com/abafc7d6-dcaa-40f4-8a5e-d6724bdb980c
However as of today there are a couple of bugs in the installer preventing from installing it - this is a bug, and will be addressed in a future release (check the comments of the project to see Microsoft's response).