I won gw on other site but....

As Snaku said, maybe you can make a group giveaway, or give it away on other sites (if the original site's rules allow it). And I'm interested in FF2, if you plan to give it away, please invite me :P

You might wanna activate that copy of Clans you won 3 months ago, seems like a nice game. Give it a try. :)

Yeah, I don't think you can use it for a giveaway here, maybe you could use the forums at least, I dunno. But yes, feel free to give it away, that's always a nice gesture if you do not want it. Try a Steam group, like suggested above, or anything. You could maybe make a post on NeoGaf.com (Am I allowed to mention other websites?) about the giveaway and do it through there. There are probably many ways you can do it, but this website is not the place. Hope that helps.

You can list the giveaway under any of the games in that bundle. For example, you can create a giveaway for Peggle Deluxe and put in the description that the winner will get extra games as well.

The people here who say that you can't make the giveaway are completely incorrect.

can't you unbundle it and then gift each individual game?

Ask support to make a Humble Popcap entry. It's long past now so I wouldn't hold my breath on it being added as a matter of course.