From Joystiq:

"Microsoft isn't bluffing: Gamers can log on to Xbox Live within the first 48 hours after launch and download 'Texas Hold 'em' -- completely free of charge! This full-featured poker title for Xbox Live Arcade on Xbox 360 will launch on Wednesday, August 23 at 0800 GMT (1am Pacific). For 48 hours only -- Wednesday, August 23 through 0800 GMT (1am Pacific) Friday, August 25 -- as a special limited-time only promotion, gamers can download (and own) the game at no charge (for all Xbox Live Gold and Silver members). Starting at 0801 GMT (1:01am Pacific) Friday, August 25, 'Texas Hold 'em' for Xbox Live Arcade will be available for 800 Microsoft Points."

Maybe I missed something, I'm a little confused as to whether it's like a 48 hour free trial....and after the 48 hours are up you can buy the game..or if it's totally free to anybody who downloads it in the first 48 hours.

Either way, this is awesome.