Using Freecom DVB-T (freeview) USB2 stick on Linux
Note: these instructions are for the UK only and are followed at your own risk.
Edit: These instructions are for version freecom stick version 03. Version 02's firmware is available in this package: http://linuxtv.org/downloads/firmware/dvb-firmwares-20110802.tar.bz2.
On recent versions of Ubuntu
wget http://home.arcor.de/efocht/dvb-usb-wt220u-fc03.fw sudo cp dvb-usb-wt220u-fc03.fw /lib/firmware
Insert the USB stick - the light should turn orange.
And you'll want something to watch the TV with - I recommend kaffeine:
sudo apt-get install kaffeine kaffeine
Kaffeine should detect that you have a DVB device and let you scan for channels.