Well, I can't even log in, so I'll just have to forget about this. I hope AC 3DS will come soon!
Just on my experience with WEP connections, I will recommend a Nintendo Wi-Fi USB Connector.
I recommend it as even though my connection is compatible with WEP and WPA, I kept getting irritated that my Animal Crossing Wild World didn't connect.
I didn't want to change the setting just in case as I like to have a secure connection for my PC, Laptop, all of my consoles that use WPA connections and my iPod Touch.
I decided to take a risk and purchase a Nintendo Wi-Fi USB Connector from Amazon UK not knowing whether or not it would be a waste of money or not and to my delight, I was able to figure out that I didn't need to tweak any settings as I just turned off my Firewall and Anti-Virus, installed the Nintendo Wi-Fi USB Connector and it has worked well to this very day as I have downloaded quite a few event Pok?mon on Pok?mon Diamond, Pok?mon Pearl, Pok?mon Platinum, Pok?mon HeartGold, Pok?mon SoulSilver, Pok?mon Black and Pok?mon White now.
I have also got a friend code for Animal Crossing Wild World which made me happy.