O-Games have announced that they are bringing Superstars V8 Racing to the USA via the PSN. Superstars V8 Racing will cost $19.99. O-Games reveal that the reason for bringing the game to the PSN instead of releasing it at retail was because American retailers have limited retail space. Because of this a satisfactory retail window could not be found. instead, O-Games worked with Sony to bring the game to the PSN and because the games now coming to the PSN it will cost $19.99 and not the $39.99 it would have cost at retail.
From USA Playstation Blog