Proposal: Computer Graphics
Potential http://cg.stackexchange.com site is now in 58% commitment phase. It needs more veteran StackExchange users (with knowledge in Computer Graphics, and high SE reputation) to enter Beta phase.
I think most of the main contributors of http://gamedev.stackexchange.com are experts in Computer Graphics, and it seems a good idea to invite them to the commitment phase. Here is their ranking by reputation:
I do not know of a method integrated to SE to send invitations to commit to the site ; but this can be done via other social networks (among them Twitter, LinkedIn).
So, if you know those experts, try to invite them to the commitment phase!