Yea, AZCOM's website is not helpful. I interviewed at AZCOM in September and absolutely loved it (well, everything aside from the tuition). I plan on matriculating here in 2014.
Here are some programs I know of that you can look into:
TOUCH (Translating Osteopathic Understanding into Community Health) program. DO Students complete various community service projects through volunteering at local free clinics, medical fairs, etc.
TOPS (The Team of Physicians for Students) program. Medical students help complete free sports physicals for high school students.
DOCARE international mission trip. MWU collaborates with DOCARE international to provide medical care to people in Guatemala.
HOME (Health Outreach through Medical Education). Med students volunteer at 2 local shelters in Phoenix.
Hope this helps 🙂