If you are worried about the rusty chain gang being in front of you once you get passed the BU bridge just pass them on the left side of the right-most lane. Most of the time when I'm coming home from MIT area, I'll cross over on the Mass Ave bridge and head home on Comm the whole way. Because of all the double-parked cars, you can pretty much take the entire right lane without worry of pissing off motorists.

That intersection definite does suck as the bike lane goes from the right side and veers out into the middle to allow cars to turn right onto the BU bridge. I've always hated that area both on the bike and in the car.