energy regained

I have regained the energy and enthusiasm to work and read. I am porting the 2.4 hcd to the new 2.6.12 usb stack. I have also started looking at memory management, and started reading the L4 sources. However reading and trying to understand the usb stack sucks enough of my daily vitality. The device/driver subsystems, khubd etc. should start to make sense as soon as I see the code running live.