Sony has announced that Gran Turismo 5 Prologue will be release April 17th, 2008. It will be available on PSN as a download or on Blu-Ray disc for $39.99 in either format. The disc version will have an extra behind the scenes video available.

GT5P Features:

• Up to 16 player online
• 60+ cars
• 5 tracks (all reversible or different configuration)
• GT-TV (Watch various racing shows and manufacturer videos)

I am currently up in the air about the purchase. I love GT so I very well may end up getting it