Is your AP sending out a SSID? Check with the original WifiLib demo to see if you can get an SSID on the list. WifiLib <{POST_SNAPBACK}> Yeah, I get mine instantly on the test.
Hmm. The screen isn't refreshing for me on the DS. Keyboard is a little messed up too. Pressed Caps Lock and had it press enter. Edit: Reconnected and the screen refreshes fine now.