Does Angry Birds and other games have Leaderboard on Android devices? I went to a Best Buy store and tried Android tablets but didn't see any Leaderboard for Angry Birds Space edition -- is it because it is not logged in as a game user or does Android have a standardized Leaderboard similar to iOS's GameCenter yet?
Android as a platform doesn't have any equivalent to GameCenter currently. Some Android games use OpenFeint for leaderboards and achievements, but it's not an official standard of any kind and it's not implemented in the Angry Birds games specifically. Other games choose to implement their own leaderboard systems (PewPew does this, for example).