I updated the BBC iPlayer desktop today and noticed it now has a live TV feed, you can watch most BBC TV programs straight on your desktop, no TV card needed.

Pretty Cool 

Sorry but only for the UK

Download Link:
http://www.bbc.co.uk/iplayer/install

Ahhh! I see a new clause coming in our TV licencing. If you have the net you have to have TV licence even if you have no TV/ariel.
But I have one so cool.
You've been able to get live TV on iPhone and such for a while now.