Just a quick note for UK users with dvb-t reception.
This device is on offer for a few days for £24.99 at maplin.co.uk. Offer ends 27th October 2009. Sadly, I just paid £40 for mine!
totallymaxed has added support via the wiki:http://wiki.linuxmce.org/index.php/Kworld_KW-DVB-T_399U
By the way...
If you planning to use the 399U with 0810 then you will need a different v4l deb... the on linked to on the Wiki is for 0710's kernel only. PM with your email address if you want to try our 'testing' universal v4l package that supports this tuner.
All the best