I've done the same thing, too -- Friday I registered as a RAT to vote in the WV RAT primary. My plan is to vote for whomever is behind at the time, since I'd like to see the RAT nomination settled in an ugly fight on the convention floor. If they remain close at the time of the WV RAT primary, I'll probably vote for Hillary, since I think she'd be a better (let me rephrase that -- a "less worse") president than B. Hussein Obama, and since I think she'd be an easier opponent in the general election.
On the other hand, my gorge really rises at the thought of voting for that woman.
THAT should be the one factor in anyone's decision to cross over and vote RAT. In the event of a McCain loss, which of the two Rats would you rather see in office?