9
Thanks for the suggestions!

I've tried them all and still show 0 online. I think I might be messed up somewhere due to the fact that I added the IPB module (it actually isn't the problem, it was working fine when I first installed -- but I've since upgraded Xoops, plus been hacking away at some files, and I probably messed up something in the process).
So I think the next step is to remove that module, reupload the XOOPS core files, update the system module, and see what happens!
EDIT> geez, I'd hate to lose all the work I've done integrating the IPB module so far. So I'm going to avoid uninstalling the module for now, and try to figure out what went wrong. I just checked the xoops_online table, and it's completely empty, the script no longer seems to be writing to it at all.
Brad