Here's how to do to get this DVB-T board to work. Download the attached firmware, open your terminal and execute:
tar xvjf xc3028-v27.fw.tar.bz2
sudo cp xc3028-v27.fw /lib/firmware/
sudo apt-get install vlc win32codecs libdvdcss2
Restart your computer.
Generate a channels.conf file from v4l-dvb (see linuxtv.org for details), open VLC, open channels.conf, open the playlist (Ctrl-L), and you'll see your list of channels.
For more info: http://davidwinter.me.uk/articles/2008/02/08/watching-freeview-dvb-t-tv-with-vlc-player-on-ubuntu/
The attachement is also downloadable here: http://ubuntuforums.org/attachment.php?attachmentid=82736&d=1219665844
At last it works! :)