From GameTrailers:
Here’s an interview with BioWare’s CEO Ray Muzyka, about Mass Effect 2, being developed in Montreal. Well, I’m pretty sure it’s the Montreal tream that’s working on Mass Effect 2, but please correct me if I’m wrong.

BioWare’s top dog gives us a taste of Mass Effect 2’s dark story and gameplay [...]

From IGDA Montreal:
When: Wednesday, May 20th @ 7:00pm What: IGDA-Montreal Presentation Night Where: The SAT, 1195 St.Laurent Why: BioWare on Mass Effect 2 iterative level design [...]

From IGDA Montreal:
When: Wednesday, May 20th @ 7:00pm What: IGDA-Montreal Presentation Night Where: The SAT, 1195 St.Laurent Why: BioWare on Mass Effect 2 iterative level design [...]

From gamedaily.com:
GameDaily BIZ just got off the phone with EA’s vp of communications, Jeff Brown, and BioWare co-founder and CEO Ray Muzyka, who revealed that BioWare is establishing a new BioWare Montreal group to work within the existing EA Montreal studio. Muzyka said that the team will be working on the highly anticipated Mass Effect sequel [...]