Video: An Overview of XNA
Daniel Crowley-Wilson and Luke Drumm (a couple of my Readify colleagues) had a chat at Tech.Ed Australia 2007 about XNA game development for Virtual Tech.Ed. This chat is now online for viewing and gives you a nice 10 minute overview of what XNA development is all about and what it means to the homebrew scene. Hopefully it will whet your appetite to have a go and write your own game and have a bit of fun.
Go and check it out :-)