Hi C.,
My little 'huggie bear' is the same way (almost)... 3 am, she's looking up at me with big bright eyes, happy as can be, talking to me - I want so badly to interact with her, but I know that nightime stimulation should be kept to a minimum,... i dont even change a diaper unless she is soaked, or has pooped...she is typically up for about 1- 1.5 hours...
I will usually lay her back down, and let her talk a bit, and when she starts crying i will go in and try rocking her again for a few minutes... sometimes just the fussing for a few minutes is enough to make her tired and accept her pacifier and be wrapped up for sleep again. But i always lay her back down somewhat awake - she needs to learn to get herself to sleep.
they also say that the better they sleep during the day, the better night time sleep will be.
my only additional advice for you... don't start anything you're not willing to keep up (laying with him, bringing him into bed with you, etc.)- i know we get desperate as moms to just get by and get some sleep... my trick for that... Lo-Carb Monster Energy drink - LOL! seriously - i would be a zombie without that dose of caffeine :) and I get really crabby on little sleep... between the Monster and the Paxil I take, I'm managing :)
I dont know if I've helped at all with your dilemma, maybe some other moms can give you tips on changing his crazy schedule. i know there are some good books out there, but i've never read any, and honestly haven't had too much trouble in this department, knock on wood! (knock knock)
Good luck!