Eh.
Before Hillary started actively pissing me off, I thought she wouldn't be a good choice for VP if Obama got the nomination because of (among other reasons) the "two firsts" aspect. I think some people are inspired by the "first" thing, and it's a positive. I think other people really have to overcome that -- they're willing to vote for Obama
despite the whole "first black president" storyline, rather than because of it. And making it "first black president" PLUS "first female vice president" just adds more complication and more vulnerability, IMO.
I also don't think she's enough ballast when it comes to experience.
She seems cool, as a governor, and she and Obama seem to get along well. Maybe a cabinet position? But I don't think she should be the VP.