The Witcher Forums have some tidbits from Piotr Gnyp's Twitter Feed with some tidbits from an upcoming interview with CD Projekt RED that reveal some of their plans (thanks Gamer's Hell). Here's their summary:

• Unnanounced dark fantasy title (Witcher 3?) is in more advanced stages than Cyberpunk 2077.
• Cyberpunk 2077 is the first in a series, both games are larger than The Witcher, both are multiplaform
• 2013 will be smaller stuff for CDP RED, no Witcher-caliber release
• Witcher for iPhone - too early to say anything, but not impossible

EDIT: missed some stuff:

• no Witcher for PS3 next year, they want TW on Playstation, but not current gen
• both TW3 and CP2077 will appear on next gen consoles