Xbox Live Marketplace update confirms a few dates for us. Pid and Pool Nation drop tomorrow, while the ToeJam & Earl Collection and Karateka are beating towards November 7 releases. Jordan Mechner's beat-em-up was orignally set for a week later, but the Major says otherwise. Each game costs 800 MSP.
There's also some noteworthy DLC on the way. Assassin's Creed 3 and WWE '13 get season passes today for 2400 and 1600 MSP respectively, while Sleeping Dogs can now explore the 'Nightmare in North Point' for 560 MSP. When Halo 4 comes out on November 6 the succinct 'War Games Map Pass Season One' should be ready and willing for 2000 MSP. Finally, the similarly concise Magic: The Gathering - Duels of the Planeswalkers 2013 gets 'Deck Pack 1' on November 7 for 240 MSP.