USB WLAN dongle Ralink 54Mbit from DealExtreme (0x148f:0x3070)
This one does not seem to work very well on Ubuntu 9.10 out of the box. Some extra config may be needed.

ifconfig
wlan3 IEEE 802.11bgn ESSID:""
Mode:Managed Frequency:2.412 GHz Access Point: Not-Associated
Tx-Power=20 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:on
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
dmesg output
[17848.810013] usb 1-6: new high speed USB device using ehci_hcd and address 3
[17848.981104] usb 1-6: configuration #1 chosen from 1 choice
[17849.182542] cfg80211: Calling CRDA to update world regulatory domain
[17849.215519] cfg80211: World regulatory domain updated:
[17849.215522] (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[17849.215525] (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[17849.215527] (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[17849.215530] (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[17849.215532] (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[17849.215535] (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[17849.333078] phy0: Selected rate control algorithm 'minstrel'
[17849.333857] Registered led device: rt2800usb-phy0::radio
[17849.333873] Registered led device: rt2800usb-phy0::assoc
[17849.333889] Registered led device: rt2800usb-phy0::quality
[17849.334111] usbcore: registered new interface driver rt2800usb
[17849.348344] rt2870sta: module is from the staging directory, the quality is unknown, you have been warned.
[17849.351192] rtusb init --->
[17849.351262] usbcore: registered new interface driver rt2870
[17849.360222] rt3070sta: module is from the staging directory, the quality is unknown, you have been warned.
[17849.362983] rtusb init --->
[17849.362988] Error: Driver 'rt2870' is already registered, aborting...
[17849.362991] usbcore: error -17 registering interface driver rt2870
[17849.428637] udev: renamed network interface wlan0 to wlan3
[17849.449511] rt2800usb 1-6:1.0: firmware: requesting rt2870.bin
[17849.755172] ADDRCONF(NETDEV_UP): wlan3: link is not ready
More info to come...
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