From the ground up port of Manic Miner to the Zune. The same code base will run on Windows and Xbox 360 but those projects are not included here - I'm looking to make this available to Zune users as there is a buzz around that device at the moment.
There are a few gaps in terms of the levels (Kong, Skylab) but it's pretty complete. Also, there are no sound effects - sorry about that. If there's interest, I'll fix these things up.
You'll need Visual Studio Express 2008 and the XNA Game Studio 3.0 CTP to build and run this on your Zune.