The below was obtained from my system log and indicates the channel used. Linksys is the access point name..,never bothered to change it but it is secured via MAC filtering and a WEP key. The information from the log is not readily obtained. I run an app called system status and the system log module provided it. Sytem status is available in the app store.
May 10, 2012 11:38:59 PM - kernel [0] (Debug): AppleBCMWLAN Woke on same BSS: @ 0xc322ec00, BSSID = 00:0f:66:2b:21:36, rssi = -75, rate = 54 (100%), channel = 1, encryption = 0x4, ap = 1, failures = 0, age = 18, ssid[ 7] = "linksys"