i got the same results

Here's what I have now:

fredl@positron:~$ iwlist scanning
lo        Interface doesn't support scanning.

rausb0    Scan completed :
          Cell 01 - Address: 00:40:96:33:92:02
                    Mode:Managed
                    ESSID:"3DN"
                    Encryption key:off
                    Channel:6

eth0      Interface doesn't support scanning.

eth1      No scan results
sit0      Interface doesn't support scanning.

vmnet8    Interface doesn't support scanning.

vmnet1    Interface doesn't support scanning.

fredl@positron:~$ iwconfig
lo        no wireless extensions.

rausb0    RT2500USB WLAN  ESSID:"3DN"
          Mode:Managed  Frequency=2.437 GHz  Access Point: 00:40:96:33:92:02
          Bit Rate=11 Mb/s
          RTS thr:off   Fragment thr:off
          Link Quality=0/70  Signal level:-41 dBm  Noise level:-203 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

eth0      no wireless extensions.

eth1      IEEE 802.11b  ESSID:""  Nickname:"Broadcom 4301"
          Mode:Managed  Access Point: Invalid
          RTS thr:off   Fragment thr:off
          Link Quality:0  Signal level:0  Noise level:0
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

sit0      no wireless extensions.

vmnet8    no wireless extensions.

vmnet1    no wireless extensions.