Liberal, in the sense that the majority of posters here subscribe to various beliefs that could be placed under that umbrella label (in the sense of the conventional definition of liberalism, as opposed to the American definition). I mean, there are only a handful of hardcore left wingers (TNF, SWE), actual conservatives (DC, Cathcon and TJ) and intellectually barren types (me) to provide any variety.
This is pretty much correct. The liberal family is a pretty wide-ranging ideological family, though, and encompasses many yellow, blue, orange, light green, and red avatars who don't agree on very much in practice.