Apologies for cross posting. This comes via Andy Rohne. I think it will benefit the CTPP, TMIP and H+T community since there will data users from different industries and we can learn from each other. The good part is that it is not another email list but rather a Q&A site where answers are voted up or down and people have an interest in giving credible answers to maintain and increase their reputation. I use stack overflow extensively and have found it to be extremely useful.
http://area51.stackexchange.com/proposals/51674/open-data?referrer=pQZ2DWiJaFTat
Krishnan