The "cat genie" is here. We have now been testing/using it for 2 months and our cats are fully adjusted to it. Basically you hook it up to a toilet or washing machine/water line and place the included plastic pellets in the box, along with the included liquid soap cartridge. The cat goes in and the box then liquifies the contents and carries and washes them away (you can program it to wash as many times per day as you'd like). The only thing we've needed to do is change the liquid cartridge (takes 5 seconds) about once/month and occasionally check to make sure the line is clear. It has made taking care of our 2 cats very convenient and no more fights about "who is cleaning the litter box". At $299 it seems like a steep investment, but if you add up what you spend on cat litter and the time it takes for the old fashioned box, it's well worth it. Oh and by the way, there is no more cat box smell either.
Hurry if you want to get a Cat Genie. The price is going to increase in a couple of weeks (if you buy before 2/14 you can get free shipping, lower price of $299 and no heavyweight extra charges). All of this changes after 2/14