Yeah, when you finish a game, a progress graph appears on the screen which represents if you have been doing better, the same or worse since the first time you tried the game. If you get a score better than your current average score, you get points added and you are one step closer to "going pro" if you do worse points are taken away.
I think an online leaderboard is only a matter of time though. It could be easily done with a system update.
Slightly off-topic, but do any of you know of a app that lets you take pics of your mii (once its transerred to the pc of course)? I thought I'd just re-create my mii avatar via that java app floating around, but it kinda sucks visually.
p.s. I'll add my friend code a little later, I'm not really into trading miis but I look forward to playing you all online once the functionality arrives.
Btw it might be good to setup a very simple wii-friendly website with links on all the friend codes. Click on the link and it sends them an email with a generic "this is wii# blah blah from byoac wanting to be added to your friends list" via javascript. It'd only prompt for a byoac username. Since it isn't fun to type on the wii this would make adding everyone a LOT easier.