Mitt handily winning the first Florida exit polls

But they're not a very large sample size.

From campaignspot.nationalreview.com:

For Those Seeking The Usual Leaks...
I'm told not to expect any word of exit polls until around 5 p.m. ...

UPDATE: For extremely localized results, the Naples Daily News is publishing its exit poll results as they get them. Their numbers so far:

Republican presidential primary

Mitt Romney - 107

John McCain - 66

Rudy Giuliani - 32

Mike Huckabee - 15

Fred Thompson – 3

Ron Paul - 2

Democratic presidential primary

Hillary Clinton - 48

John Edwards - 15

Barack Obama - 15

Joe Biden - 2