But what if you are not at home? Or say, you are at a McDonald's grabbing something to eat. Well, there is some good news. Nintendo is partnering with McDonald's to provide FREE wi-fi access. So while you may want to play with other diners in the restaurant (it is a lot of fun to play with someone you can see), you can also try other online players.
Now if you are wondering if it will require a Ph.D to make it work and if you will have any problems, well don't you worry. If you bring in your Nintendo DS and wifi enabled game, it will detect everything automatically, allowing you to play without any setup.