I don't have a lot of time to help, but I can suggest a few things.
I agree that we need some more content on the site than just the links and the jam. I'm not sure how we could get the different comic each day thing to work right, but we could try using some html files on the auto update to have a "New Today" list of links on the main page that would update every day of the week with the links arranged according to each different comic's scheduals. just make one html file for each day of the week and then make enough copies in the workspace/comics folder so that it'll auto update everyday for a couple months and then take the files out of the archives after a while (since we won't use the ***next_comic***, ***Last_comic***, ect... tags) and rename them back in the workspace/comics folder.
Also I think we should do some contest/challenges other than the panel jam. The only reason I haven't done a panel for it yet is because I haven't been able to think of a good idea and it may be that way with others. If we do a bunch of different kinds of contest/challenges like draw a character this way, a mini-comic featuring so and so punchline or character in a different way, or a quick and dirty (under 30 minutes sketch) of some subject or idea every now and then.
And in addition to the cartoonist profile/questionaires, each month or week we could just put up one question asked all the turbocoolers and thier different answers. The question could be about anything, world events, "come up with your own idea for a new TV show", personal questions not asked in the profile, ect...