I live in Phoenix, Arizona and know my way around the Metro area. Finding grave sites for others is cathartic; I've been searching for my family's history for a few years now and could only go so far without assistance. I feel compelled to help others discover their "roots" as it were.
There may be opportunities to find graves in other cities within Arizona although, the price of fuel is a major deterrent.

Cemeteries in my area:

A & FM (Masonic) Cemetery
All Saints Close Cemetery (All Saints Episcopal Church grounds)
All Souls Cemetery
AOUW Cemetery (Ancient Order of United Workmen)
G A R Cemetery
Pioneer & Military Memorial Park
National Memorial Cemetery of Arizona
Arrowhead Memorial Garden
Beth El Cemetery
Beth Israel Memorial Cemetery
Greenwood Memorial Lawn
Glendale Memorial Park
Holy Cross Cemetery
Holy Redeemer Cemetery
Queen of Heaven Cemetery
St Francis Cemetery
Cross Cut/Williams Cemetery
Double Butte Cemetery Tempe