I'd bank on mini-golf being unlockable when you connect to the GBA version, or maybe if you hunker down and complete all the other modes. I hope it's available in come capacity, and in a more inspired form than Mario Golf N64. Even if it's not there, Mario Golf GC is still awesome. The truckload of modes make me very excited about what Camelot will do with Mario Tennis.
You don't have to buy the game at Target to get the Target Tour. Enter the code, play a round, win prizes (including a Nintendo office chair, I think). Hollywoodvideo's grand prize is some mountain stuff and a ton of Nintendo merchandise. You're gonna have to be able to shoot in the low 50s, maybe even the 40s, to win either grand prize though. Personally, I just want the kickass second runner-up hat (for 500 people) in the hollywood video contest.