Zap2it's servers are down!!
TURN OFF YOUR AUTOMATIC mythfilldatabase SETTINGS!
If mythfilldatabase runs, you will lose some, if not all your listings. (trust me, I found out the hard way).
You can check to see if their database is up by going here. If the actual page shows up, you should be fine and can run mythfilldatabase again. If you get a ton of Oracle errors, it's still down.
If you find that you've lost some settings there are 2 options (once Zap2it is back up):
1. run mythfilldatabase --manual from SSH or a terminal. It's a bit tedious, so beware.
2. run mythtv-setup. Select "no" to clearing card info, but "yes" to clearing channel info. Re-setup your channels and connect it to your card, then download all the listings again by running mythfilldatabase once. It should grab the next 2 weeks all over again.