I just got back from voting, and had absolutely no wait whatsoever. I was amazed, but from all reports, I've been the exception.
Two things worth noting: If your polling place is using the ink-a-dot system, MAKE SURE the pen is really marking the ballot! I had to mark the same vote 2-3 times sometimes, because the little guard-rails on the voting guide were a bit too hight.
Also, a previous voter had left a flyer in the booth urging a vote for Bush. This is clearly illegal, and I brought it to the attention of the volunteers. If you see something similar, please bring it to the attention of your polling official.
Early exit polls (which are wildly unreliable) are showing a pretty strong Kerry victory. Knock wood....