Is Clickteam working / planning / outsourcing some extension in the near future that would allow MMF2 users to easily integrate an online high score board to their iOS games?
In Flash, MochiScores is absolutely great due to its extremely simple and straightforward configuration in MMF2. I would love to see something similar for iOS as well.
Custom PHP+MySQL leaderboard is of course always a good option and gives you more flexibility. But there are many downsides with this option as well. I actually dropped my custom online high score system and replaced it with Mochi in Flash games.
I've heard some talk about Game Center object. While that would be great to have, I'm not sure if it allows posting scores as "guest" i.e. as non-registered user, or does it require user account registration? Many casual players don't bother signing up, so that kind of an implementation would not work very well. Are there any alternatives available?