I believe there are enough threads in the Forum FAQ, namely:

Earning/Spending Miles on Partners & Star Alliance

Earning MP miles on UA's air partners:
http://www.flyertalk.com/forum/showthread.php?t=445613
Details the booking classes and percentages earned on all partners.

All things related to USAir and United codesharing/partnering can be found here:
http://www.flyertalk.com/forum/showthread.php?t=419054
http://www.flyertalk.com/forum/showthread.php?t=393324

Flights operated by America West Airlines (HP) now earn MileagePlus miles. More detail here:
http://www.united.com/page/article/0,1360,50107,00.html

... that will allow me to close this thread and ask that discussion occur on any of the threads linked above.

Thanks!

FlyinHawaiian, Co-Moderator
United Mileage Plus Forum