UPDATE! As seculated this is the free app of the day for July 7, 2011.
Top selling iPhone game Fieldrunners will be launched on Amazon App Store tonight at midnight and will be free for the first 24 hours. It is a tower defense sort of game that appears to be pretty promising… Will it be the free app of the day for tomorrow, or are we looking at a bonus free app? So remember to check it out 7/7/11.