This current logo the Wiki has is quite outdated. I mean, it was the snail from season 2. Two seasons later and a few changes, so I think we should change the logo. It's a bit too late for Fionna and Cake, so... why not Flame Princess and Finn's nice kiss? Pick your favorite of the two logos or if you still want the outdated snail.
UPDATE May 29, 2012 at 3:26:
Apparently, it's against the rules (I really don't get these rules) to have favor one couple...... so I made Finn and Jake with a little pal involved... I really wish we could base it off on one scene, but... whatever. This logo or the snail lich from season 2? Avoid looking at the ones above and pick the Finn/Jake or the snail.