Bootstrap should include vector icons by default. In the era of HiDPI displays, bitmap icons look just plain ugly (unless served in double resolution). Nobody should use them. (Not to mention save of bandwith!)

Bootstrap 3 is switching to glyphicon fonts, which I think look better than the FontAwesome stuff.

http://blog.getbootstrap.com/2012/12/10/bootstrap-3-plans/

You can see the bootstrap 3 branch in the bootstrap github project.