[Boost-users] [thread] comparison with Intel Threading Building Blocks

I just received (again) some doc on the Intel Threading Building Blocks (TBB) (http://www.threadingbuildingblocks.org/). I was wondering how the boost.thread developers/supporters would compare TBB with boost.thread (btw: the book of James Reinders on TBB mentions boost.thread) ? thanks in advance, t