I only have time for a quick-hit–head over to Open Left for Chris Bowers' analysis of the state of the race, including new polls from ARG and Time magazine:
Chris has an easy-to-read chart. ARG, which has shown Clinton ahead in Iowa all year, has Clinton 28, Obama 23, Edwards 20, Richardson 13.
Time has Edwards 29, Clinton 24, Obama 22, Richardson 11.
ARG seems to be polling a broader sample of Iowans, and I think they are polling too many people who have no chance in hell of showing up on caucus night.
That said, anyone would have to agree that it is very tight in Iowa now. If the polls stay like this up until January, no one will have any idea who is going to win. Too much depends on how candidates' support is spread around the state and who leads among second choices.