Hey guys I'm new. I got a suggestion for you people who have wireless connection problems. I'm not sure if it will solve your problems, but it's worth a try. I had similar problems with my ds a long time ago. I could not connect it with my wireless router. The SSID would show but that's it. Anyway I found this:
link: NintendoWIFI.comDoes your router use 802.11g?
If your router uses 802.11g, it may default to only the "g" band. This setting will not work with the DS. Check your router's settings (typically in the "Wireless" tab) and make sure that it is set to "Auto," "Mixed," or something similar.
So I hope it helps out you guys. I will be opening my wii soon. Peace.