Massive apologies to everyone for the Epic Fail over the last three days of the site. Suffice it to say, everything's working now, with one small change -- you once again can only vote on each poll once. I think that's basically what was hosing the site, combined with the massive failure of the MySQL servers from my host. The latter issue either contributed to, caused, or hid the previous one, otherwise I'd have had it all back up much sooner.
Thanks to Ryan C. at DreamHost.com for finally calling me and hipping me to what the problem was. Hopefully we can get back to normal around here now.