1. A karma point system for comments/posts... the good posts can then be bumped up, so when people read them, we aren't bombarded with "ehh, its alright", but rather worth while posts.
2. A setup feature where, after I log off, my son isn't playing what I've already accomplished; likewise, when my son clicks "play new game", it shouldn't delete my stuff.
3. There's a lot of "build your own" game sites on the web; I'd include a links page, so that members of Gamesbutler can say "hey, please try my game and tell me what you think."