Scan results from different devices:
WUSB54GCv1 (rum):
0x00000 00:1a:70:9e:9a:70 1 54M -78:-95 100 EP RSN
wpi0 00:19:d2:01:02:03 1 54M -73:-95 100 ES WME
Intel 3945BG (wpi):
linksys 00:1a:70:9e:9a:70 1 54M -69:-95 100 EP RSN
rum0 00:1d:7e:01:02:03 7 54M -66:-95 100 ES WME
RTL8188EU (urtwn) (without this patch):
0x00000 00:1a:70:9e:9a:70 1 54M -140:-95 100 EP RSN
wpi0 00:19:d2:01:02:03 1 54M -140:-95 100 ES WME
rum0 00:1d:7e:01:02:03 7 54M -140:-95 100 ES WME
RTL8188EU (urtwn) (with this patch):
0x00000 00:1a:70:9e:9a:70 1 54M -65:-95 100 EP RSN
wpi0 00:19:d2:01:02:03 1 54M -53:-95 100 ES WME
rum0 00:1d:7e:01:02:03 7 54M -57:-95 100 ES WME