Hillary won't happen, the liberals don't even like her. Demonrats put up with her BS, but I bet more than a few would secretly vote Republican.
Rasmussen has had her negative numbers fluctuating from 40-45%.
Rasmussen also has a poll (and it isn't the first) where it shows that more people have already decided to vote against her, rather than for her.
40% have already decided to vote against her in 2008.
Not good, in fact, very bad for her. Only 31% say that they will definitely vote for her.
She doesn't have much wiggle room.
http://www.rasmussenreports.com/2005/hillary%20Meter.htm
Poll after poll (Rasmussen, Zogby, etc, etc) over the last 2 years show John McCain beating her by 8 to 15% in the general election.