Some great links:
http://www.usmcbirthdayball.com/
http://www.dvidshub.net/video/98519/commandant-marine-corps-deliver-235th-birthday-message (last year’s birthday message)
http://www.marines.mil/usmc/Documents/Cake_Cutting_Script.pdf (Cake Cutting Script)
http://www.marines.mil/usmc/Documents/MARINECORPSBIRTHDAYBALLCEREMONY.pdf (Ceremony Format)
http://en.wikipedia.org/wiki/United_States_Marine_Corps_birthday_ball (Wiki Birthday info)
http://www.usmcpress.com/heritage/marine_corps_birthday.htm (Even more history)
http://www.youtube.com/watch?v=43oDIkgCVOc (video of cake ceremony)