Re: ANSWER!!! I tried with mine, I don't know why but even outside of peak hour times it wouldn't be stable enough for proper online play.
Yes, it will work. From my experience I always had to have the Nintendo Wi-Fi USB Connector connected before the 3G USB Modem. I also found online play with the DS to be very stable using this method. Just depends on where you are and what ISP you use.
OH CRAP I HAVE DODO.... but we got it in Australia bayswater so i dont think were going to move anytime soon...
Dodo was a living hell for me to use. It actually got to the point where I had to switch ISP. Three and Vodafone I have found to be most reliable and cheap. I found Three to be better than Vodafone in terms of reliability. Vodafone has better speeds though when working. LOL