Like Drew said, Cats and Chocolate!

But, seriously - a good artcle and excellent plant suggestions.

There is one that you might want to add - the Spider Plant. Excellent for aircleaning purposes.

The Snake plant is a classic. We refer to it as the Drycleaning plant since a lot of drycleaners here seem to have one parked in their window!

The flower once in a while, a delicate tiny white flower.