As long as it's going to be a circus let's get Arnold Schwarzeneger and Gary Coleman to run, too. If I were Pelosi, and even if I had the articles of impeachment in my hand at this moment, I would stick them in the desk drawer for awhile just to see what happens. It'll be like witnessing a car wreck. You didn't want to see it, but you just can't stop looking. Not to mention that if by some strange twist the articles did get filed, then Sheehan's weird moonbat mob would be slightly legitimized and she would have a golden statue of herself placed in public view for people to pray to (and urinate on).
Pelosi's constituents would probably do best to just pretend Sheehan isn't there if/when she starts campaigning.