I see there are already a lot of threads pointing to UX salary surveys. I have tried a few and either the links don't exist anymore or the data is very old.
I'd like to offer you a picture of salaries in London as they stand, and I hope people could do the same for Cities across the US. Of particular interest is New York, San Francisco and LA.
Salaries are similar whether you are a UX researcher / IA / IxD. Visual UI design salaries tend to be slightly lower unless it is for mobile specifically. In the UK the senior title tends to be used after 5 years of commercial experience with mid-level being 2-5 years.
London salary guide 2011
Range - £80,000 – £100,000 (€90,000 - €115,000)
Range - £65,000 - £80,000 (€73,000 - €90,000)
Senior IA / IxD / Researcher (all same salary brackets actually)
Range £55,000 - £70,000 (€62,000 - €79,000)
Mid IA / IxD / Researcher
Range £30,000 - £55,000
General Flash designer - £30,000 - £50,000 (€34,000 - €56,000)
With Mobile UI experience - £50,000 - £70,000 (€56,000 - €79,000)
Please fill in the blanks for where you work (your perception of the average for your location and not for your employer)