it CAN play multiplay online, it just hasn't released any games that do so just yet. so yes, multiplayer is coming. no it can't play DVDs, they left that out because 1) it keeps the cost of the Wii down and 2) they figured (correctly) that most people already have multiple DVD players and including one in the system wasn't a neccesity. I'm not sure about CD playing as I've yet to try, but from what I'm hearing it cannot. And have no clue about mp3. I know you can stream music from the web through the Wii opera browser though.