He really is in the Iowa polls but a caucus is so different that it is difficult to gauge by polls. Organization and hardcore support are crucial. They're polling from a sample of 3 million of which maybe 125K will caucus. From all accounts Dean has the best org. there and Gep's is good too as he and his supporters have been down this road before and the union support usually comes out to caucus. These polls may be setting expectations too high for Kerry, it's a mixed blessing -- if he now finishes 3rd, even a close 3rd, it will be a disappointment where as a week ago it wouldn't have been.
My best guess is Dean pulls it our narrowly over Gephardt, with Kerry and Edwards close behind. I'll say Dean 28, Gep 26, Kerry 22, Edwards 17.
Then again, who the heck knows what those nutty Iowans will do!