Hillary Clinton is my #1 choice (I'm not sure there are any other viable female possibilities), but I would kill myself if Biden or Cuomo won the nomination.
Elizabeth Warren
Amy Klobuchar
Kirsten Gillibrand
At the moment I'm undecided, but Sherrod Brown and Russ Feingold sound good too.
Yeah, I like all three of them a lot and know they're listed as possibilities. I just don't think they'd have the support to mount a successful national campaign yet.
They'll definitely be on the list of potential running mates though. I'm confident the Democratic will have a female candidate either on the top or the bottom.