Marc Ambinder has been looking at the early Ames straw poll scene. So far he sees the biggest show of support for Mitt Romney (obviously), followed by Sam Brownback and Ron Paul. Though at this early stage, it may be hard to tell out-of-state volunteers from Iowans eligible to vote in the straw poll.
My understanding is that like Romney, Brownback, Tommy Thompson, and to a lesser extent Mike Huckabee have all made signficant investments in getting people onsite. The Paul campaign has reportedly bought just 800 tickets for its backers. We’ll see.