Actually I have nothing much to add to this — Wikipedia standards for inclusion actually seem to continue to evolve, imperfectly but generally in the right direction. Webcomics continue to get added, edited and sometimes put up for deletion. This post seems to be a good overview of keeping an entry on Wikipedia up in the face of efforts to delete (it was inspired by this Fall’s discussion to delete the entry for Something Positive).
And while officially I have nothing to do with it anymore, Comixpedia.org seems to be chugging along nicely as a place to put wiki-like entries on webcomics. Since they don’t delete anything at Comixpedia.org you can always start an entry there and then copy/paste with one at Wikipedia (they both share the GNU license so such sharing is 100% legal).