Finally one of my neighbors got Wireless LAN. Of course my gf was the first to discover it. The SSID is “SpeedTouch687D93”, which looks like default (The last part is the MAC Address). Unfortunately he or she uses WEP, and i haven’t found anything about default keys for the SpeedTouch Accesspoints. According to the manuals i found on the net they have WEP disabled by default.
Additional i learned, that dwepdump from bsd-airtools does not work with my Orinoco card neither under FreeBSD 4.x nor FreeBSD 5.x. Looks like i need to download a Knoppix and get airsnort running.