It's no Prologue, but it's something.
Go to
http://www.toyota.com/index1.html
Then hover your mouse over the vehicles link at the top left, a little box will popup, then go to brochures, another box pops up and then click on "request brochure"
Fill out the info (take note that a phone number is NOT required, a guy on another forum is getting calls from a local dealer). At one point, it'll ask what you want a brochure for, make sure to choose the Prius as one of them.
Submit and wait for it to arrive!
It's a limited game, only cars are the Toyota Motor Triathalon Car and the Prius. Fuji & Grand Canyon are the only tracks, for two laps, with a 2 minute time limit.
It's not much, but it's something and it's free. To bad we didn't get the same version Japan did. It had 40 different Toyotas, no time limit and more tracks I believe.
BTW, I'm told it supports steering wheels for those who were wondering.
Tell everyone you know to order it. HopefullyToyota will get swamped with orders and PD will get a clue and start giving us the special GT games.