been using mine the same way, this is the walkthrough i followed on debian squeeze, this same setup has yet to work for me on wheezy
1) edit the file "/etc/modprobe.d/blacklist.conf" and add the line
2) Get hold of module file "8192cu.ko" either by compiling from source for ARM (hard) or from the link provided in the forum (easy, shown below)
and then type
tar xf 8192cu.tar.gz
sudo install -p -m 644 8192cu.ko /lib/modules/3.1.9+/kernel/drivers/net/wireless/
sudo depmod -a
3) Make sure you have the file /lib/firmware/rtlwifi/rtl8712u.bin. If not, there is a link in the forum for you to download it.
4) Insert the dongle and reboot. You should see the module initializing as it boots
then to configure
ifconfig wlan0 up
iwconfig wlan0 mode ad-hoc
iwconfig wlan0 essid "Pi"
sudo ifconfig wlan0 inet 220.127.116.11
connect to wireless created by the pi, assign yourself an ip of 18.104.22.168, ssh into your pi at 22.214.171.124!