If you're looking for general information about the Avigo, check out Texas Instruments' official site, and then go to the Avigo Downloads page to see what is really going on. There is also a very active developer-oriented mailing list that you can join at Onelist.
I welcome any and all contributions of freeware code and/or documentation!
Now allow me one moment to cover my butt: The code provided comes with no guarantees implied or otherwise. Use at your own risk, and always backup the data on your Avigo before installing ANYTHING new. Don't get any mistaken impressions: this stuff is pretty raw, but the idea is to get it out there so people can use it as a starting point for understanding how to code in the Freeware SDK.