There are free webhosts just for comics. DrunkDuck comes to mind, but I'm sure they're not the only one, and I'm not familiar with how their service works at all. I'd recommend looking around and comparing what different hosts have to offer.

Also, there's always deviantART. You'd have to do first/previous/next links yourself in the artist's comments section (I wouldn't recommend doing a "latest" one on dA, since you'd have to manually update it on every existing page every time you added a new one), but that's simple HTML, and plenty of us are on there already and know how it works.

~Neshomeh

You're aware of the fact that wordpress isn't really comic software, right? I don't know if there's a plugin for these webcomic buttons, but if you can't find anything, you should have the whole system built from scratch. That way you can split the blog from the comic, if you want to. And other things.