Might & Magic: Clash of Heroes is the next free offering in the "Games with Gold" promotion. Starting October 1, Xbox Live Gold members can grab Capybara Games' excellent match-three RPG without the $15 entrance fee.
Rainbow Six: Vegas is the current deal in the program, and that will expire next Monday. Those still waiting on Halo 3, which was announced as part of the program at E3, will have to hold out a bit longer.