I've seen various Stumbler applications which survey for open 802.11x networks. The problems I am ecountering with a WiFi network appear to be related to radio interference from some undetermined source of 2.4 GHz emissions. Using a WRT54GS, all of the wireless clients get knocked off the network simultaneously everyday, at various times in the afternoon hours. I need a means to identify all of the 2.4 GHz signals in the network site in an effort to identify channel conflicts. I am unable to identify any open networks, which the Stumbler utilites identify. Now, I'm left wondering if there's a closed WiFi network in the building that is running on the same, or adjacent, channel. I really don't want to play a guessing game by changing the channels, then waiting to see what happens. I'd like to identify the interferring channel, if there is one. I'm not even certain it's a channel interference issue. Ideally, I'd like purchas a handheld hardware 802.11x sniffer for site surveys and troubleshooting, or to find a software equivalent, but as soon as you say "sniffer" everyone thinks I'm a hacker trying to break into someone else's WiFi network. Not! What are the most useful tools for identifying radio interference?