Well, after much hand wringing and hosting comparisons, I ended up doing as Tahir suggested and setting something up on myfreeforum.org here. Not much to look at now, but it'll let us try things out and if we need a full time host we can move later on. However, the price is right, and the ads aren't obnoxious.

So, thanks for all you help! Hopefully it'll work well, we should be letting others users in soon.

Best,
-Chris