The Pew Philadelphia Research Initiative has released a report on Mayor Michael Nutter and also on sales tax has been released. It is a 13 page pdf. Here's an excerpt from the press release:
Halfway through his four-year term as mayor, Michael Nutter continues to get generally high marks from city residents after a tough economic year dominated by a prolonged budget crisis. Fifty-three percent of Philadelphians approve of the job he is doing as mayor, compared to 32 percent who disapprove. This is an improvement since April 2009, when his job approval rating was 47 percent and disapproval was 39 percent.
Metropolis has some analysis of this.
Governor Rendell released his initial budget plan today. The Pennsylvania Budget and Policy Center has a review of it.