Nice going man any chance of a wireframe?
Theres a real easy way for DOF, you set the cameras center of interest to the focus Distance (think its that) in the hypershade and then use the foucs region scale value to adjust the amount of DOF (oh also have it switched on). To set where you want the DOF to focus just select the camera hit "T" and then use the manipulator to place the focus area.
Some of the settings might for the above might be wrong as ive not got maya open as ive been having a bit of a holiday.
Like Marlon said if you look in the hlp files for DOF it goes over what it is and what the various attributes do
"No pressure, no diamonds" Thomas Carlyle