Get more games from your humble origin bundle

There is a button that says "CD key" in your steam library on the game info page. If you click it, it gives you a cd key that can be activated in origin (didn't work with the first dead space and mirror's edge for me, other games work fine)
This way, your humble bundle origin keys are not used and you can give them to your friends.
If you already activated them though, you can give your friends the keys steam gives you.
Result: the bundle gives you 2 origin keys instead of one for the games that can be activated in steam (DS and ME excluded)