I sorta wondered since the car was having some issues. It's running so much better now other than this problem with the intake manifold. I did what you described, but I was being super careful by hand tightening the bolts and then lightly tighten it at 5 ft-lbs. The ends tightened up first. I guess it's time to get a new one. Ugh... expensive mess. I'd rather leave it in the hands of a pro like yourself at this point.
I don't enjoy the hobby enough to work on the engine.
[EDIT] I guess I'll have to pull stuff apart again. A couple of friends will come take a look and will try to get the broken bolt out. Once that is done I'll order a new intake manifold, bolts, and possibly new gaskets. If I can get to the lower bolts on the throttle bodies removal won't be as difficult.