The Humble Double Fine Bundle consists of Costume Quest, Psychonauts, and Stacking. If paying more than the floating average (currently $8.23), Brutal Legend is also included. If paying $35 or more, the Broken Age Kickstarter game is also included while $70 or more will also include a t-shirt.
This also means some new titles are coming to Linux per the usual Humble Bundle requirements. The game some Linux gamers have been looking forward to playing is Brutal Legend.
The usual Humble Indie Bundle rules apply about the games being DRM-free, name-your-own-price, and pay-what-you want. You can buy this collection of Double Fine games at HumbleBundle.com over the next two weeks.