I voted no. I generally don't bother with online gaming....on the PC , DS or anything else. I technically CAN do it, I just don't. Too much cheating and the 24/7 crowd (people that live, eat and breathe a given game) slaughters me all the time, so I just don't bother. I had fun online when MKDS first came out, but then snaking was discovered and the balance of the game was ruined and it killed any further interest in online gaming. While I did learn snaking and got OK at it, I found it more like work than fun.
But I do use the Opera Browser on my DS frequently.
This is not to say that I didn't at least TRY various WiFi games, it's just that they always confirmed my reasons for disliking online gaming.
It would almost be worth it to add a, "Only for web-browsing" option to the poll.