One real interesting development is that Richardson has told his supporters to back Obama on the second ballot. The Democrats in Iowa vote twice and without a secret ballot -- if a candidate does not pass the 15% "viability" standard, their supporters are given a chance to support another candidate.
This is telling because Richardson was clearly, until about a week or two ago, positioning himself to be HRC's VP. Then when HRC started to show signs of trouble, he started to attack her. This may be the final sign that HRC is in trouble.