check out for a little more explanation :
more information (which also lists Church of Christ, Christian Scientists and the Ahmish as exempted)
(this link also states those that are exempt are subject to a 2.5% tax)
second link also goes over other "erumors" relating to the health care reform act.
and another site that discusses the religious exemption in the health care reform bill :
(discusses at length the muslim interpretation and religious laws)
another good fact checking website :
(specifies only Old Order Ahmish may be exempt)
hopefully this will help clarify any rhumors you guys have read about and help us all understand what's really, well, what with this HUGE piece of legislation.