If you want to vote for a viable candidate for the U.S. Senate, I'd urge you consider a vote for Admiral LeRoy Collins, Jr. If you want to vote for a candidate who will lose by 30%+ in November, Katherine Harris fits the bill.
As for the Gov's race, the best bet is Charlie Crist. He's not as Conservative as most of us would like, but Gallagher's campaign tactics against Crist were very sleazy, and turned off a lot of people.
In the interest of disclosure, we both know you are not going to vote for Collins or any other candidate in the Florida primary or general elections because you are not a Florida resident.
Just because someones campaign tactics are not warm and fuzzy should not be the sole reason not to vote for a person.