iSat is a small utility that makes easier to point a dish to a satellite: it uses Location API to get your current position and will show various parameters:
Sat Longitude: chosen Satellite position
Azimuth(T): how many degrees relative to True Azimuth
Elevation: elevation degrees
Skew: Polarization angle, useful if you have to point more than one satellite with a single dish
Azimuth(M): Magnetic Azimuth (will be implemented in next release)
Coordinates are expressed in decimal degrees. (http://en.wikipedia.org/wiki/Decimal_degrees)
Geostationaries satellite list is a 2007 one.
Objective C source code will be soon available on the site.