That poll was indeed a Zogby poll, and here is the methodology:
These are telephone surveys of [likely voters] conducted by Zogby International. There were approximately  questions asked. Samples are randomly drawn from purchased telephone voter lists. Zogby International surveys employ sampling strategies in which selection probabilities are proportional to population size within area codes and exchanges within those area codes. Up to six calls are made to reach a sampled phone number. Cooperation rates are calculated using one of AAPORÂs approved methodologies and are comparable to other professional public-opinion surveys conducted using similar sampling strategies. Weighting by [party, age, race, gender] is used to adjust for non-response. The margin of error is +/- 4.5 percentage points. Margins of error are higher in sub-groups.
The poll was also made up of 500 respondents as shown elsewhere in the article.
Either Kenski or Zogby are way out of whack at this point as there is an 8 point difference between the two. One has released their internals, and the other. . .
Of course I do not believe that the local polls were fixed, I believed that the random sampling to be a problem with the local organizations limited funding. Do you think that either of the local polls were able to make six calls to a sampled number? Also notice that weighting was done by party, age , race, and gender. Look at the Governor race poll numbers for the discrepancy between local and national polls as well.
All that being said, this is a tremendous deal to the race. Gifford's biggest strength was her inevitability. That is now gone. If local Republicans start believing that their vote for Graf is the only thing that can stave off a Pelosi Chairmanship, they will start coming home, especially now that Graf appears to be closing. A bigger problem for Giffords is what do you attack Graf with that he hasn't already seen and overcome? Giffords on the other hand, is still riding pretty high on an unsullied image. What happens when people start asking for specifics on what she has done to secure the border and lower taxes? I have looked at her record, there just isn't much there to support this, and definitely less that she sponsored or was the driving force behind.
The final good news is that we actually have a race, so as bloggers both to the right and left, this is a good thing.