As much as I'd like to see NASA head towards the moon again, I don't think it'll happen. NASA is a government entity, receiving government funding. I work for an independant government corporation, and it does not receive government funding, so with the exeption of oversight, we can operate somewhat autonomously so long as we stay within the TVA Act (of 1936).
What will get us "back" to the moon, is either a shift in government to 'want' it, or private corporations who somehow see some money to be made.
If they got away from government, then they wouldn't be NASA anymore...