mondo84: One of the worst things about Steam. Imagine you have a code and you're not sure if it's been redeemed or not. You want to check before you give it to someone. But you can't check, for some odd reason.
Braussie: If you purchased it yourself, can't you go to your steam gift items, and look to see what you have available, as well as "pending gifts" in your inventory? Mind you, I haven't used steam much since christmas when they changed the whole trading and layout stuff... Cause i like GOG better.. :)
For inventory items, yes, but not for keys. Two separate things. Inventory gifts can be emailed or traded. Keys can only be "redeemed". GOG, on the other hand, has a confirmation screen when you enter a gift code to show you what you're redeeming.
I like GOG a little better, too. ;)