I would say images of the games you are champion in, probably a 28 x 28 and by clicking on those images redirects you to that arcade game.
Would have to be able to set a limit on how many show up in there, as with alot of games installed, if I was champion in 1800 games, I would not want 1800 images in there.
So if I set the max games to show to 20, it would show only the last 20 games I got the highest score on.
And probably the tooltip like Freekoid said.
Also the trophy icon for the top 3 trophy holders. With a tooltip when you hover over it, it shows (User) has highest score in xx games.
Also the award icon for the longest players. With a tooltip when you hover over it it shows (User) has played xx:xx:xx
And of course it would need to be integrated with postbit tabs.