From Eric Dondero:

Not the top tier of polling firms, but SurveyUSA is the first to show Fiorina ahead of incumbent Democrat Senator Barbara Boxer.

From CBS 5 San Francisco:

A new SurveyUSA poll in California finds Carly Fiorina (R) edging Sen. Barbara Boxer (D) in the U.S. Senate race, 47% to 45%, a lead which is within the poll's four point margin of error.

Key finding: The poll found twice as many Democrats cross-over to vote Republican as Republicans who cross-over to vote Democrat in the race.

If all other current polls hold for the GOP Senate races, particularly key races in Nevada, Kentucky, and Florida, with a Boxer win that would secure the Senate for Republican control. (With Independent - Lieberman as a possible tie-breaker.)