According to the Massachusetts State Athletic Commission (via sherdog.com):

Main Card:
- Frankie Edgar $96,000 (includes $48,000 win bonus) def. B.J. Penn $150,000
- Randy Couture $250,000 def. James Toney $500,000
- Demian Maia $68,000 def. Mario Miranda $8,000
- Gray Maynard $46,000 (includes $23,000 win bonus) def. Kenny Florian $65,000
- Nate Diaz $60,000 (includes $30,000 win bonus) def. Marcus Davis $31,000

Preliminary Card:
- Joe Lauzon $24,000 (includes $12,000 win bonus) def. Gabe Ruediger $8,000
- Nik Lentz $22,000 (includes $11,000 win bonus) def. Andre Winner $10,000
- Dan Miller $30,000 (includes $15,000 win bonus) def. John Salter $8,000
- Greg Soto $12,000 (includes $6,000 win bonus) def. Nick Osipczak $10,000
- Mike Pierce $24,000 (includes $12,000 win bonus) def. Amilcar Alves $6,000

Plus the $60,000 fight-night bonuses:
- Fight of the Night: Nate Diaz vs. Marcus Davis
- Submission of the Night: Joe Lauzon

photo via ufc.com