The good news for Romney fans: a Reuters/CSPAN/Zogby poll released today has him up by 3 points in California. The bad news for Romney fans: two other California polls, a Mason-Dixon poll and a Field Poll, have McCain ahead by 9 and 8 points respectively. As for the Dems, the Field Poll has Clinton sightly ahead, Reuters/CSPAN/Zogby has Obama slightly ahead (yes, that's big) and Mason-Dixon has Clinton up by 9 points.
For more Super Tuesday polls, see here.
(A reminder: California's primary is not winner-take-all in either party.)