TSN’s Bob McKenzie has tweeted that a deal between the Bruins and Flames involving a straight swap of Marc Savard  and Calgary  defenseman Robyn Regehr is “a serious consideration for both teams.” 
Like many of the Savard rumors to come up in recent days, the deal wouldn’t seem to accomplish the perceived Bruins’ goal to cut costs while also improving the team. Regehr makes slightly more than Savard per year (both make just over $4 million per year). Additionally, both players have provisions in their contracts that would allow them to squash the deal.
It’s worth noting that Bruins general manager Peter Chiarelli did say the team could be in the market for another defenseman, but keep in mind a deal for Mark Stuart  has yet to be wrapped up.