Sakurai has today confirmed that Super Smash Bros Brawl will contain WiFi Play in his latest blog update. Online play for SSBB will consist of two modes - "With Friends" and "With Anyone". Sakurai has also apologised in advance that although he has done his best with online that the game may become slower the further you live away due to lag. Also mentioned in the blog is how you will play with friends and yes it looks like you will need to use some sort of friend code, but it doesn't mention them specifically.