Just picked one up from my local Gamestop. Apparently, he hadn't sold a single one yet. Don't know if that's good or bad. I just hope it gives me a little better driving accuracy without having to dig out my wheel for a quick race.
And now that I've tried it out on GT5, I can honestly say that I do like it better than the DualShock. The sensitivity when steering is the biggest plus. The accelerator and brake aren't nearly as useful, because the DualShock has analog R2/L2 anyway (this one does not), and I find my thumb gets more tired mashing the accelerator than even on the standard X button. The START button is too soft, but that may just be my controller. I do like the long wire, as that just means I don't have to worry about lag or dead batteries. It does have a Macro button as well, and I am quite keen on the design.
Overall, I'd say it was a step up from the standard controller, when it comes to racing games, but falls well short of a wheel.