Is it possible to separate the THQ bundle keys or be able to trade games?

Guess

no

Only the games that you get if you beat the average value come with separate codes, so that is why Saints Row and Titan Quest flow through SteamGifts like the FORCE in Star Wars... Otherwise, you cannot separate the games in your bundle (I personally lost Metro 2033 because I already had it when I bought the THQ bundle)

Thank support for only adding Saints Row The Third and allowing people to do this. Every game in every bundle regardless of key distribution has been added to the list except for the Humble THQ Bundle.

Not sure why they decided to change their format with this bundle, but it's allowing people to exploit their system. I informed them a week ago and clearly nothing has changed yet!

Keep in mind that Red Faction: Armageddon and Metro 2033, which both appear in the Humble THQ bundle, may be legitimate giveaways if they're listed individually. These games were in a different THQ bundle at Amazon some weeks back, so those giving them away may be giving the Amazon keys rather than the Humble Bundle key, since they don't need them.

Greed: If you get something valueable almost for free and you still want more.