If anyone here at "History" is interested in genealogy, there currently (as I write this) is a proposal for a StackExchange site for "Genealogy and Family History" at Area51.
If you're interested, I encourage you pop over there and "Commit" to the proposal and help the site get started. You all have 200+ Rep and you would very much help it reach what it needs to get to Beta.
The site is at: http://area51.stackexchange.com/proposals/43502
I am hoping that by the time you read this, the Genealogy and Family History Q&A site is already Beta, or maybe is already permanent. If so, we'll welcome you.
I'm sure many of our genealogy buffs will also be coming to join you at your history site.