Rosewill RNX-MiniN1 (RWLD-110001) Wireless-N 2.0 Dongle (1T1R) IEEE 802.11b/g/n, USB2.0 Up to 150Mbps Data Rates, WEP 64/128, WPA/WPA2, and IEEE 802.1x

Pros: Very small, works fine with my XP desktop about 60 feet away from my Linksys WRT54G2 . $10 delivered. I don't use this much since I also got a Rosewill RC-409LX 10/100/1000Mbps Switch which runs wired at 320MB/sec (byte, not bit).

Cons: None so far but, but I don't use it that often.

Overall Review: If you need one, buy one. It is so small and cheap, I got one I really didn't need, but still like it.

Pros: Steps to get the 8192cu driver to work under ubuntu 10.10 kernel 2.6.39

Make sure your ubuntu environment is setup to build things. I think the minimum would be the build-essential package.
Run the following command to install that: sudo apt-get install build-essential

Download driver from here: http://www.realtek.com/downloads/downloadsView.aspx?Langid=1&PNid=21&PFid=48&Level=5&Conn=4&DownTypeID=3&GetDown=false&Downloads=true#2742

Unzip the driver.

There were two source files (driver/rtl8192_8188CU_linux_v3.0.1590.20110511/include/rtw_io.h, driver/rtl8192_8188CU_linux_v3.0.1590.20110511/include/osdep_service.h) including a header file named (linux/smp_lock.h) that was not needed for driver creation.

Chanage to directory you extracted the driver zip. In my case that was ~/Downloads/rt2/RTL8192CU_8188CUS_8188CE-VAU_linux_v3.0.1590.20110511

Cons: Edit the file driver/rtl8192_8188CU_linux_v3.0.1590.20110511/include/rtw_io.h search for the line:
#include <linux/smp_lock.h>
and comment it out like this:
//#include <linux/smp_lock.h>
and save the file.

Edit the file driver/rtl8192_8188CU_linux_v3.0.1590.20110511/include/osdep_service.h search for the line:
#include <linux/smp_lock.h>
and comment it out like this:
// #include <linux/smp_lock.h>
and save the file.

Make sure the wireless usb adapter is not plugged in.

Overall Review: In ubuntu run the following command in order to become root: sudo su
Make the file install.sh executable by running the following command: chmod +x install.sh
Install the driver using the command: ./install.sh
If all goes well you should see the following:
The Setup Script is completed !

Run the following command to see that the driver is loaded: lsmod | grep 8192
and you should see something like:
8192cu 477140 0

Exit the shell and insert the usb adapter. Happy networking.