The May 19 Aviation Week & Space Technology has quite a few RJ economic analaysis as well as a review & flight the of the emb170. I haven't read the review yet, but looked forward to FT complaining about the full load range of 2.1knm.

It occured to me that if it was lightly loaded, you could probably fly it SFO-EWR.

Also, see the grphs on pp. 52-53.