I just posted the design details of the Millett "Starving Student" hybrid amp on my website:
Starving Student hybrid
Think "Millett Max" for the financially impaired... or maybe "Millett Min"?
The idea was to design the simplest, lowest cost hybrid headphone amp possible. It still had to perform well and sound good, of course. I think I suceeded... it sounds very good.
If you're coming to CanJam, you can listen to it. I think Nate M will also have his version there.