Joe says farewell. His last YouTube campaign video:

And here's Chris Dodd's good-bye. We at PrezVid will miss him, for he made more creative (if long) use of YouTube in his campaign. Apparently that won't win you elections yet.

Meanwhile, Mike Gravel is NOT saying good-bye (and who thought he would ever?). This is his briefest video ever, telling Olberman that reports of his political demise are exaggerated.