"The real limit will be finding that many free hosts that actually work"

I guess thats similar to the free hosted blogs situation.
I am in the middle of setting up these and at least half of them are not working. As soon as I am finished with these I will start setting up the freehost zz network.

Contentsolution lets you (amongst other things)converts content e.g. articles into RSS. I have not tested it yet but I guess it could work with the archive mode.