Yes you are reading that correctly, Guilty Gear XX Λ Core Plus will finally be coming to NA PSN next week for $14.99. The news was dropped by Guilty Gear director Takeshi Yamanaka on Twitter over the weekend. The game has been out on XBLA since late October.
If you are wondering about a EU release date:
For the release in the Europe region, please wait a bit more. Thanks for your patience.
An interesting note on the Guilty Gear homepage says that while this is a port of the PS2 version of the game, there are plans to update the game to the current Arcade version GUILTY GEAR XX ΛCORE PLUS R. We will be sure to let you know when we hear more about that.