Yeah, I had read an article about tobacco smoke and dust screwing up Brawl because it's a dual-layer DVD, right?
Well, personally, I've had more than a few problems with Brawl not working. I've had it randomly quit on me about 4 or 5 times (the Wii is in a perfectly clean environment), once so bad it just froze my Wii up completely and I couldn't turn it off or sync my remote up with it; then, after I rebooted it it had killed my internet connection and all that good stuff so I had to reconnect all that crap.
I did see that video on IGN where they tested the Wi-Fi stuff with a few random brawls trying to prove its quality and the framerate was awesome.... You will probably never had that good of a connection. It's never that good. It's crappy at best. It's always choppy and whatever input you throw in there is delayed by a second at least, so you annoyingly never know what you're doing. It will very, very rarely sync up right and if it does it will last for about half a second if that before it just goes choppy and slow again. You know it's going to be an unbearable two minutes if the animations of everyone coming into the brawl before the fight is choppy. If that happens to you, just go ahead and get out now because it'll never be right. It takes about 98% of the fun out of online, and the fact that it's completely anonymous is not cool. Also, I remember all the talk of custom messages for online play and whatnot... now it's just for playing with friends.... not cool.
Everything else though, is very amazing. I loved Subspace. I wish every Mario game and everything could look that good.... if they made a remake or new SMB with the looks of Mushroomy Kingdom, then that'd be an amazing game... or a Mario movie with that kind of look... but I'm just dreamin'.