Math.SE has about 400 questions tagged 'computer-science'. While most of them work well here, some questioners may appreciate more computer science flavor in answers, or may also have questions that are not ontopic on math.SE.
For those people (and others), a Computer Science proposal is well on its way to beta. Please consider supporting it if you are interested in computer science.
Note that the current description "Proposed Q&A site for Computer Science academicians." is not the community's choice. We are trying to have it changed to something like "For students, researchers and practitioners of computer science.", so that is what you should expect.
Edit: As of March 20th, cs.SE is in public beta!