So, I've pre-ordered Portal 2 from Steam and got the 10% discount and a free copy of Portal. I already have Portal since, well, since it came out, and I think that pretty much everyone who would want that game already owns it, but, anyways, I've decided to give away this extra copy of mine to a fellow GiantBomb user. 
 
All that you have to do is post here your Steam ID so that I could add you as a friend in Steam and send you the copy. I'll make this offer available until I see no one else is interested and then I'll randomly select one lucky user. Sounds fair. 
 
Edit: Should have put this on the Portal forum, right? Oh well.

Awfully nice of you. I have the Orange Box so I obviously already have the game but congrats to who gets it!

SteamID: Halberdierv2

How does anyone not have portal?

Im in a case.. I have portal from when it was given away for free last year, it didn't have SDK in it, which I need pretty badly. I hope this one does, though.

Steam ID : vestigial.man  

Yeah, any self-respecting gamer with a computer has Portal. I too have an extra copy as well as en extra Half-life 2 and Episode 1 that I can't seem to give away because everyone I know either already has them or has no interest in computer games . 
 
Edit: I have given away all my extra copies. Glad I could bring the Half-Life goodness to two more lives today 

" @Winternet: well, if they want it from me, they better have seen this thread. 'Cause I don't feel like holding a raffle drawing, know what I'm saying? "

" @Bocam: Yeah they already gave it out for free when they launched Steam on Mac! "

Steam ID: yoshimitzu707

I hope you pick me!

There are people who never bought The Orange Box, the greatest deal in the history of ever? You people disgust me. Do not talk with me until you've completed Portal.

I already own Portal, so I just wanted to say this is a great thing you're doing.
Best of luck to all you "Portal-less" people! May the best random user win XD

 http://steamcommunity.com/id/vestigialman/          Just in case.  

Some time in 2010, you could literally download Portal on Steam for free because of some promotion. Surprised to see many people seemed to miss it.

Steamid: Torvus1987

just saying that people are crazy for not having portal already. the game is awesome and other stuff. i have portal on both xbox 360 and steam. i think i might get it on ps3 and pc because the PC version is free if i get it for ps3. also, there is a special preoder bonus of getting a different suit or something for the two robots in the game.

" Yeah, any self-respecting gamer with a computer has Portal. I too have an extra copy as well as en extra Half-life 2 and Episode 1 that I can't seem to give away because everyone I know either already has them or has no interest in computer games . "

I don't even like Portal and haz it.

my steam is jopapi2k6 <--- does not own portal, btw check for account dates cuz if it's a steam account made recently (like yesterday) they might have naother acc with the game i dont want to be cheated =[

@ Getz 
Will grab that episode 1 off you if thats ok :D 
http://steamcommunity.com/id/leoplureodon

So when is the draw??

SteamID: ofcbilly77
 
That's pretty awesome of you, dude.

" How does anyone not have portal? "

I've been needing Portal for quite some time. I played my buddies Orange Box Portal for the Xbox 360. Loved it, and have been aching for a chance to play it ever since. My Steam ID is darthoni. To everyone else: Good luck. Have Batman.