I gotta get one of these!
http://www.performancebike.com/shop/Profile.html?SKU=14408
That's pretty neat, but honestly, it isn't a patch on the Tacx I-Magic .Up until a few years ago, technology as advanced as the I-Magic would have cost well over £1000 (translate into your currency

)
I use a Giant TCR2 on my trainer, I am confident the bike isn't being harmed in any way. Although the front wheel is held in a clamp (I have the optional steerer unit), it is allowed some movement.
I doubt if I'll use it much when it comes into the British summer, but there will always be bad weather days after a long day at the office when 45 minutes on the trainer is more appealing than getting prepared to go out on the roads :-[
Dave.