Thanks for introducing me to the site!
If you were to ask me before, I'd think that the StackOverflow would be good enough because many, many data problems are programming related (how to parse one format, database optimization, etc)...but there are issues specific to data, such as denormalization...not how or necessarily when to do it at the database schema, but why...or rather, given a set of data (such as from the gov't) in which normalization was obviously not done...what is the most sensical compromise that you should do in organizing the data?
Anyway, hope more people get into it...I've worked in data for awhile and now, having to think about it, it's definitely a big enough field with enough questions to justify a vibrant SE board.