My MBP 3,1 (early 2008?) normally just connects to my WLAN when I start it up but very occasionally it connects to a nearby WiFi Hotspot. When it does, turning Airport off then on again sometimes gets it to connect to my WLAN but sometimes it just keeps re-connecting the the hotspot. The only solution - and it works every time - is to reboot. But rebooting seems such a Windows thing to have to do. Does Airport "prioritize" its choice of connection, e.g. first tries to connect to the last WLAN it was connected to? One other thing. If I go into Network Prefs and click the Advanced button, I see my WLAN there but there seems to be no way to tell it to connect to that particular WLAN - the equivalent dialogue in Windows for example has a Connect button so you can select a WLAN and hit connect to force it to (try to) connect to that one, but there's no Connect button in OS X. In case it's important, I don't broadcast the SSID on my WLAN.