I also had this garbage on my wii name back when i was using nintendo's software. Last spring i installed the drivers to convert it softap. No more anoying pop up. Homebrew now works and my PSP and friends laptops can connect to the net. I'm not looking back.
Another thing i noticed, when i was using nintendo's software, if id power off the PC and power it back on the day after, the wii would never find the access point back until i power it (the wii) on. It was always trying to connect and made an error until i started the wii, then it could connect fine.
With the ASUS software and fixed IPs, the wii jump right back online as soon as the PC and USB dongle are back on. It also seems to connect quicker and faster, both on the wii and DS.