We pay $75/hr for a usability engineer quasi interaction designer in Philly.
I do the actual graphic/web design work (putting everything together,
providing living prototypes for him to test). Of course, we're a
non-technical industry (healthcare) and have other UCD folks on staff, but
he tells me we're in his low range.
Please smack me if this type of discussion is off-limits here...
On a similar note, I'm pondering a move, and wondering whether freelancing,
finding a design agency, or a full-time position is better.