I rounded up some usual suspects for this list last year and not a lot has changed for 2009. Toto and Duravit still lead the pack. However, I got a lot of great comments to fill in during the past 12 months and two new additions: The VitrA Omni and the Mini Loo. Check out all the comments here: Best Small Toilets 2008. Got a new small toilet I don't know about? Let me know in the comments...
• MiniLOO by Neo Metro
The MiniLOO uses an in-wall tank system, saving lots of space in the bathroom. The look is super simple and streamlined, and is available in a choice of finishes...
• The Starck 2 Toilet
My favorite looking toilet, Starck 2 has been installed by posters to this site: All in one version and in Two piece "space saving" (you need larger than normal air space in your wall or you need to build your wall out thereby losing space) wall mounted version - Jamie Pup
• Toto Aquia
Gotta add the Toto Aquia to the list. It's relatively new, but it's available. Small tank, very nice design, and also a water-saving dual-flush model (so it has a smaller, 0.9 gal flush as well as a regular). Pilgrim
• Kohler Rialto
...quite pleased. It is compact and flushed well. I would purchase it again if I were re-doing another bathroom. - Lonnstrom
• Toto Dorian
It's great, nice and small and uses very little water. It has "power flush" and is really quiet. Sasha
• Purist Hatbox Toilet from Kohler
...You know, it sort of looks like sitting on a small trash can. But it is small.- AT
• Duravit Happy D
...projects 21.25" from the wall but I think it runs around $1000 and requires a plumber to install the tank inside the wall. - Yen Ha
• Toto Ultimate
The best small medium priced toilet I've heard of is the Toto ultimate (about 250$ 2 1/2 years ago). I polled residents in my building when I needed to change to a low flow model upon purchasing a unit I'd been renting and this model won. - Jonathan D.
• VitrA Omni
I like (and recently installed) the Vitra Omni, small footprint, one piece, and under $250 from a local plumbing shop. - Pdx-R
• Veneto Toilet: This slim toilet is made by Porcher and was sent to us by Laura Dixon, who calls it "lovely and small."