As a non-moderator, I can flag questions for a multitude of reasons. One is "It doesn't belong here" and then "off topic". After that, a list of possibly suited SE sites is shown along with a generic item.
Currently, only meta.cstheory.SE and stackexchange can be chosen. I think at least math.SE should be included, given how many questions we refer (and should move!) there. Other possible targets are tex.SE and stats.SE.
Who manages this list and how can we influence it?
Edit: Crossposted on meta.SE