Got a quick answer from my friend--he just got a new satellite broadband connection, so is online playing with the computer.

I have an incinerating toilet, uses electricity to incinerate the waste. No water, no septic system, but you burn electricity for every flush cycle.

http://www.incinolet.com/

My neighbors have Sunmar composting toilets, mostly, as there is a dealer out here.

http://www.sun-mar.com/

I have an Envirolet composting toilet

http://www.envirolet.com/

There is a very good book about composting toilets that I recommend. The Composting Toilet System Book, ISBN 0-9666783-0-3, about 20 bucks or there about, worth the money if you need information.

There are lots of topics and issues, what to add, saw dust, peat moss, etc. The information provided by the manufacture is ok, but I would oversize the toilet to allow for those times when everyone visits. If you have specific questions I have an opinion. The short answer is that I will add another composting toilet in the house, probably two.