Scoreloop, OpenFeint, GameCenter are already quite established and comprehensive frameworks. It will be hard to catch up with any of them unless you offer something unique or unless you can identify and address some of the pain points developers might have with what they are already using.

It seems like it's a "late to the game" situation. However, the space is hot, so if you're clever you might put some pressure on those guys.

A little background:

I've assembled a team of devs, we've started developing our game ( http://traingame.tumblr.com/ - yes, shameless..), and we're currently favoring Scoreloop.

Convince me: Why should we choose Mogade instead?

I appreciate the constructive feedback. I agree it isn't going to be a walk in the part. This was one of those launch-early type things, so I can't honestly come up with a compelling argument (unless you're dying for WP7 support...).

I think if you want something simple/straighforward, or you are particularly keen on the open source nature of the drivers (which has its pros and cons) we offer a solid solution.

At the very least, I'd ask that you look us up again for your next game and see what's changed :)

Perhaps a graphical representation of how things work?

Fill the front page with images of the leader boards and all the other services you offer being taken care of on your servers.

Show a picture of the ONE LINE OF CODE they add to their game.

Show everyone smiling at the end.

Make the text really really big.

Have arrows connecting it all like a flow chart, so I know where to start reading.

Have the flow chart end with the "SIGN UP HERE" call to action button.

(at least that's my "gut reaction" recommendation based on what I hope for and what I like on signup pages.)

please make sure that it's roughly one line of code :)