Being reported in the Boston Herald's "Inside Track" that the location seems to be going to Seattle or Portland, OR. (Thanks to hiddenboston for the FB link).
"That details are sketchy, but it appears Boston’s efforts to snag the 10th season of “Top Chef” have bottomed out. Word from the Left Coast is that Portland or Seattle will get the nod for the next season of Bravo’s popular cooking contest. Yawn. Apparently, the Hub and its local businesses failed to cook up the cash and a big enough sponsorship deal although we reported weeks ago that Boston Beer Company was onboard. We hear the winning city coughed up free hotel rooms. Yup, that’ll do it! Mayor Tom Menino’s office had no comment."