Hmmm, it's still entirely just XMame...
Just out of curiousity u_rebelscum, does this list incorporate all of the differences between Mame Analog+ and regular Mame?
Potentially hardware-specific code:
Support for 8 controllers.
Dual lightgun support
Splitmouse option
Mappable mouse input
Resetmouse option
Multiple mice
Improved mouse simulation with analog joysticks
Driver changes (should be directly portable):
Support for Druin's interface
Rampart, Sonic 3rd player support
Minor input test changes in namcos2
Bang, Lethald Enf, Oneshot, Underfire lightgun fixes/hacks
720, arch rivals / pigskin, area51 / maximum force fixes/hacks