Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3 like Mac OS X; en-us) AppleWebKit/534.32 (KHTML, like Gecko) Version/5.0.2 Mobile/8F190 Safari/6533.18.5) Im using 5 beta 1. Just noticed at work when I logged into the local wifi on my phone that in the wii settings it now has an auto login toggle. I shut off wifi and restarted it and sure enough it gets on the work wifi without having to go through login steps. Pretty sure this didn't exist on iOS 4.
When you say auto-login, do you mean circumvents splash pages that make you agree to terms if it's a known SSID?