Water Efficient Toilet Round-Up

We've been doing quite a bit of remodeling around the house but I'm still not sure why I'm fascinated by this round-up of toilets. Did this guy try all of these? Did he personally sit on them? I'm especially enamoured of the Toto Neorest 600 with "washlet included." What's a washlet? A house elf that cleans you?

Terry Love's consumer toilet reports [TerryLove.com via Treehugger]