Make a Mii, go online, see other people's Mii's in the plaza, make a Mii of someone famous (we're getting better at this now playing "Guess Who" with some friends with Wii's), Go Online, Check the weather in spain, etc, etc
Tips:
rotate the wii-mote when using it and notice the pointer rotate
Hold A+B in the main menu to shuffle the channels around
Register your e-mail address on the Wii so you can send e-mails from your Wii to you e-mail address and vica-versa (will be more useful when Opera goes live which should be tomorrow)
etc, etc