heartbeat the site you mentioned can give u a good ball park estimate, but companies vary quite significantly in what ranges they have for a particular title, so u need to get a better idea of the scale. looking at vault.com may give you some insights, additionally, play the reverse game, ask them what the salary band is, and what determines if someone is at the lower mid or higher point on that band. go from there.
i was a member of vault for 3 months.. :--) it gave me a good insight about the company but the reviews didn't really help me that much for my salary expectation..
in my first interview i was asked about my salary expectation and i did try the reverse game and the HR responded by something like it will depend on the qualifications and blah blah..he did not give me a number either :---)
i am not sure if he will bring this up again and just make me an offer[if i get one..] and go on from there.......