Hey everybody- I'm putting the finishing touches on a universal game that'll launch in December. The rumors say iOS4.2 will be out in November, so the vast majority of the devices out there will be able to run an OS with Game Center. Granted, there are still lots of devices that will be running 3.x. For 3.x devices, I plan on using OpenFeint. For iOS4 devices, I'm currently using Game Center through OpenFeint, so your scores & achievements get sent to both places - and you can access either set of leaderboard/achievements from within the game. It'd be cleaner to support only Game Center for iOS4 devices and OpenFeint for 3.x devices though (less pop-ups, menu buttons, etc). If you had your choice, would you want your iOS4.x iPhone, iPod or iPad to use OpenFeint and Game Center simultaneously OR just Game Center? Whatcha think?