I'm going to try using a database backup, but one common thread I've noticed in all the hack advice is that it always seems to result in spam, redirects, malware, and dirty sites, but I've not had any of that. I just got a 500 error that wouldn't go away until I deleted htaccess. That sort of hacking would only seem worth it if the person just wanted to take my site down for a little bit?
ETA: Everything seems to be fine now... it may just have been a host issue.