Not quite sure how to do this (in the words of Guru Homer "Umm, it's my first day?"), but I purchased the Humble Indie Bundle 7 today, over the average so now I have several games....none I really, really want. Mostly I did it for the charity side, but also for the soundtracks. Now I have the Steam codes and no real desire to use them. Are these things that can be given away or traded?

Yeah people give away that stuff either by creating topics like this or in ninja giveaway/non-gog gifting thread.
You can set the rules or some kind of quiz for the giveaway. I think (almost) anything is ok with the community.


Anyway if you have dungeon defender from that bundle I would love to get it.

If your looking to trade, i would be interested in the Dungeon Defenders Key(actually the whole bundle....).
You can have a look around my classifieds post here:
http://www.gog.com/forum/general/classifieds/post4915

If your plan was to do a giveaway of some sorts, give it to danteveli since he asked first :P

EDIT: Thank you so much, Ian! :D