If you did not know, AMD and Valve are teaming up once again to bundle a Steam voucher in their upcoming range of HD 2900XT graphics cards. Here is some proof...
The voucher will cost AIB partners roughly $6 - 7 USD each and will be bundled with all XT cards but it is unsure at this stage if the voucher will be bundled with lower end graphics cards.
If you have Steam installed, just enter the code when the games are ready and you will be able to download and play Half-Life 2: Episode 2, Team Fortress 2 and Portal. It will be a shame if users will need to wait over a year to play the games though but the games could not be too far away as BETA versions of each are already floating around the traps.