In this question on LaTeX on SO, dmckee edited his answer to suggest the Stack Exchange site for answering questions on TeX and LaTeX. Now, LaTeX has always been a slightly uncomfortable fit on SO, since part of it is programming and part of it is simple layout. It's been accepted there since it's really impossible to tell in general whether a question will require programming or simple layout.
Given that we seem to have a functional Stack Exchange site, and assuming that it winds up being an active site post-beta, should LaTeX continue to be on topic in SO?