I have just been looking on the Nebula site which does digital TV PCI cards and USB versions and it does say that you can stream live TV over your LAN by ethernet or Wi Fi.
Networked TV!
Imagine being able to watch your favourite programme in bed on your laptop. With DigiTV you can. DigiTV allows you to stream a live TV programme over your local area network (LAN) and if you have a wireless connection (802.11g), you'll have Digital TV anywhere you like!
At around £99 plus vat including the remote controller and software, then I think thats a better idea than using a Slingbox, especially as it has the added advantage of probably being more flexible and more controllable.
Dont rush to buy one just yet though as next month they are supposed to be bringing out a dual tuner model which will allow multiple recordings and/or picture in picture plus slave USB devices for recording more channels if required