Double Fine has always had the right to produce sequels to Psychonauts, but whenever you purchased a copy of the original game on Xbox Live or Steam, the money went to Majesco, who published the game. That's changed, according to a tweet from Double Fine programmer Anna Kipnis.
"Double Fine is now the sole publisher of Psychonauts!! If you buy it now (on Steam, for instance), the proceeds go to us!" said Kipnis.
Maybe Double Fine can start a Kickstarter to get that Psychonauts sequel off the ground!
I wouldn't mind a Beyond Good & Evil HD style update to the game, either.
Basically, just Psychonauts anything.