I have tried Keenspace, or Comic Genesis, more precisely. The submission I made does not appear to have gone through, I may try it again before giving up on them.

As I live in the United States I will probably not be using servage.net, but there are some other sites I am considering as well. It's looking more likely that I'm going to need to use a paid site and set it up for the comic specifications.

As far as space, I still need to check with my artist and my techie on that. I think we were able to get the comic file down to 99 KB when we played around with it some, but I'm not sure how much more it can be shrunk. I'll ask around and get back to you on that one.