I have a Haan floor steamer and L-O-V-E it. Everyone that I've let borrow it loves it too and many have purchased one. The model that I have is the slim one and comes with the carpet attachment. It doesn't clean carpets but refreshes them and kills dust mites. It sanitizes in 1 second. You can purchase it at different places, but here's a link to the description at QVC. You can read the reviews there.
Haan Floor Steamer

I also have a Hoover Floor Mate. I like it, but the steamer is way better.