What kind of tire should I purchase for use on a bike trainer? I am in the process of acquiring a bike trainer (likely CycleOps Fluid 2) for winter conditioning.  Most of the reviews and other information I have read suggestion that a regular road tire will be damaged or quickly worn out on a trainer.  What type of tires or specific models/brands should I look for use on a trainer?  Should I get a different rear wheel/tire that I change out during the winter conditioning season?
To make it easier on myself I purchased a cheap wheel on eBay and added a trainer specific tire such as the Continental Ultra Sport Hometrainer Tire. When I used regular road tires, the rubber wore out quickly. The trainer specific tire lasts much longer.

You do not want to run the trainer specific tire on the roads. So having a spare wheel with cassette makes it easier to put on your normal wheel for those nice winter days.