The whole trainer thread made me think of this. I have a Cateye Game Bike I want to get rid of... like $45 shipped to you. I used it a bit, and its a lot of fun... especially if you like playing video games. All you need is a Playstation 1/2 and it basically is a bicycle interface for the controller, and a plain trainer. There is a steering axis controller, in place of the wheel block, which does the left and right functions of the controller. A button that zip ties to the handle bar that works in place of a brake, and a cadence/speed sensor than works in place of the throttle control. It also includes a separate controller that attaches to the handlebars, so you can make selections, start the game or whatever. Essentially, you could use it to "race" your kids while you are turning yourself inside out on the trainer trying to keep up. Its a lot more fun than a virtual trainer, but d0n probably put in in perspective as the Computrainer being WORK. This is FUN.
The funny part is that my 'trainer bike' was my old Bassboat Blue Homegrown. I wanted the all blue one at the time, but all I could find was the blue gray.