I would like to announce that on Area 51 there is a proposal new Stack Exchange site - Open Data.
Open Data
Proposed Q&A site for developers and researchers interested in open data.
Currently it is in commitment phase - so i.e. gathering a critical mass of participants. If you are interested, go there and click "commit".
(I am posting it here, as Open Data is a topic which has a big intersection with academic issues, especially related to Open Science.)