[Update: Microsoft has now officially confirmed the pack-in games. The bundled systems ship at the end of the month, and will run at least through the holiday season.]
The Xbox 360 price cut wasn't enough for Microsoft, so now it's adding free games to the mix. According to Kotaku, Microsoft will start bundling Forza Motorsport 2 and Marvel Ultimate Alliance with all new Xbox 360 and Xbox 360 Elite systems.
While they're not Halo 3 or Bioshock and are a few months to a year old, the two pack-in games present extremely solid plays. GameSpot gave Marvel Ultimate Alliance an 8.3 and Forza Motorsport 2 an impressive 9.2, so you can be confident that these aren't simply throwaway titles. Combined with the $50 price cut for the Xbox 360, these two games make the system very tempting as we near the holiday season.
Microsoft hasn't made any official announcements about these pack-in games yet, the bundles previously spotted on Best Buy's web site have since disappeared. If these reports are true, though, we'll probably start seeing game-bundled Xbox 360s by next month.