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[davidlansalot]

Here's how I send data:

NSMutableData *message = [[NSMutableData alloc] init];
				NSKeyedArchiver *archiver =
				[[NSKeyedArchiver alloc] initForWritingWithMutableData:message];
				[archiver encodeInt:myInt forKey:DISMISS_KEY];
				[archiver finishEncoding];
				[gkSession sendDataToAllPeers: message withDataMode:GKSendDataReliable error:NULL];
				[archiver release];
				[message release];