Currently delayed into last quarter of 2013:
http://www.flightglobal.com/news/articles/mrj-maiden-flight-pushed-back-over-12-months-to-late-2013-371094/

Is CSeries on schedule for 2012 maiden flight?

Looks like while the MRJ is being delayed the CSeries keeps running for a december 2012 first flight, and a late 2013 EIS:
http://www.bombardier.com/en/corporate/media-centre/press-releases/details?docID=0901260d802020e4