Major Nelson of Xbox 360 fame announced a video montage of some XNA Game Studio Express games that people have been developing. The video is optimized for Zune even! Dave "LetsKillDave" Weller explains the video on his blog. People are already doing some really interesting things. The performance of these demos is pretty impressive as well. No slow or jumpy movement in these games.
By the way, I haven't had a chance to try them but I am told that there are some good (and simple) tutorials in the recently released beta 2 of XNA GSE. After you install and run Beta 2, hit F1 to bring up the help menu. Under Getting Started using XNA GSE you will have a choice between either the 2D or 3D tutorials. They are both fairly short. In the 3D one, you will get a blank project and then get a 3D model loaded and fly it around.
As soon as I finish the lists of things that my boss has me doing during the work day and my wife has for me after work I'm going to dig in with both feet. Have any of you tried them? What do you think? Any feedback that I should send to the development team?
[Late edit: I am having trouble getting to the tutorials easily. I can find them by opening the Contents in help and looking under Getting Started with XNA though]