Some Democratic primary predictions, based on polling my gut: Dan Hynes, Alexander Giannoulias, Toni Preckwinkle, Joe Berrios.
Update: Steve Rhodes has an excellent, opinionated voting guide. The Sun-Times has a handy judge cheat sheet. The Trib has a pile of information. Mick Dumke did a detailed breakdown of the Democratic Senate candidates, and Ben Joravsky did the same for Cook County Board President and the actually really important role of Cook County Assessor.