I read this site a few weeks ago and I am placing a few Boston Ferns in my apartment (one per room) as well as a couple of Areca Palm Tree.
Don't let people tell you this is foolish, the data is complied by NASA.
oh and for you folks with cats - this list on the ASPCA
site tells you which planets are cat safe... so cross check before you start planting your indoor rain forest.
So what about the rest of you, what plants do you have in your houses?
post some pictures of your green....