You might want to try Rotor &Wing.They used to do a salary survey in the May/ June issue of each year.They did not do one in 2007.However, there is probably enough data for you.Must caution you though, the data they put out is somewaht skewered in favor of the Companies.By that I mean the salaries are inflated.I laughed when I saw what a pilot in my region, my job and my aircraft type was supposed to be making as a "median " salary.Not even close. But they claim the data is accurate.I have a sneaky feeling that when they do the survey the HR people add the cost of benefits and report it as salary.Give it a go.
Cheers,
Alt.3