Not comics whose authors make a note on LJ with each update (which a number of you do, v. useful), and preferably not feeds that bleed the author's bandwidth.
Comics posted entirely on LJ, usually without an accompanying website or non-LJ archive - get_medieval and iharthdarth come to mind (Edit: And normallife, which makes me giggle. How could I forget it?). I know there are author-approved feeds for closetspace and awfw2 (A Wish For Wings) that directly post the comic, but I can't think of any others off the top of my head. Surely they must exist, right? If they don't, they ought to. Now that I think on it, LJ seems a darn good place to stick your comic... Paid accounts get the picture-hosting capabilities, the page has no ads, it's got a ready-made archive function as well as a way to scroll through the archives page-by-page, reader feedback is extremely easy thanks to a built-in forum on every page, and it's almost certain the people 'bookmarking' your page will always notice the updates - it'll be on their friendslist.
If I'm wrong, and there aren't a whole bunch of comics out there, has anyone considered making a comic and putting it on LJ? Why or why not?