Last night (here in the UK) I was watching your final meeting on the live feed and when you all said goodbye and signed off it actually hit me a lot harder than I anticipated, so while I almost never post in forums I was struck with the desire to send you guys a letter of appreciation. It was 2am at that point so I thought I'd save writing it until today, but I've jumped on and seen that Ephezius here has beat me to the punch with pretty much everything I wanted to say (and probably written it more eloquently that I could have).
I was a huge fan of the LucasArts games as a kid and I've tried to follow the careers of the developers that started there, playing any new games they developed at their new companies like Telltale, Hothead, Cavedog, etc, but Double Fine has always stood out as my favourite. I've clocked Psychonauts 3 times across both PC and XBox (twice collecting all figments and upgrades) and Brütal Legend twice as well as completing Stacking, Costume Quest and its expansion, Iron Brigade and its expansion (I don't have a Kinect so haven't tried your other games).
I guess what I'm trying to say is I think all your games are fantastic and I look forward to playing all the prototypes and anything you guys make in the future, but Ephezius's point about loyalty to a company and feeling part of a team is spot on. As a developer myself working with a team across 3 countries, we all just use Skype to communicate, so having the live feed to your office really amped up the emotional investment in what you guys do. From the bottom of my heart, keep being awesome, and if you ever need anything (beer, a tour guide to London, a multi-touch application developer) give me a shout.
All the best