Yes we're having server issues. Yes we're working on it. Check back in a few hours when load is down.
Update (6:30 p.m. EST): The issues have been identified and fixed. Things had gone very well until the moment I stepped onto a plane this morning. Load had not been a problem (we handled 275,000 visitors yesterday and half a million or more page views), so I had no more worry about things going horribly wrong today than I do on any other day during the voting. In a nutshell there was a perfect storm of small problems with no one baby sitting the server when they occurred. Of course getting hit by thousands of requests a minute never helps when attempting to diagnose and correct problem.
Load is still high, but the polls are functioning. Sorry for the inconvenience.