bing predicts is a fun tool:
http://www.bing.com/search?q=2014+elections&FORM=MAU1BH&OCID=MAU1BH
They have Joni’s chance at 71% and Bailey/Braley at 29%
What is amazing about the BING Predicts is there is NO percentage of losing house seats! In fact 94% chance house seats will increase. Only 13% chance GOP gets back to 240 (2010 TEA Party rally), but 4 - 7 pickup looks good.