I voted this morning, cast my ballot at about 7:30 AM or so. I was number 51 to vote in my precinct, which is respectable.
The line was about 20 minutes long or so, which was shorter than I was expecting. I had no hassles in getting my ballot (I registered earlier by mail), and several people I know were able to same day register without any problems.
If you are interested, you can find a bunch more I Voted stickers on Flickr.