BOAC, if you're that way inclined, you might want to check out the sony PS3/PlayTV/PSP combination. The PS3/PSP combo makes streaming saved videos etc from home child's play (believe me, if I can do it...) and PlayTV looks like it will add the same deal for live TV, as well as the ability to record remotely and watch later. Plus the latest PSP model comes with "TV-out" iirc, so no need to watch on a laptop/tiny psp screen.
The PS3 is a good piece of kit, and I'm not the type inclined to spend days playing games on it, but use it as a home-cinema type thingy. Cheap as chips for a blu-ray player/internet on your tv/media centre play all your entirely legal video downloads/Iplayer on your TV at home and the streaming to the PSP is an added bonus as I spend a lot of time away.
Downside is, if all you want it for is streaming tv from home, it's more expensive than some of the other bits of kit, but very few of them can tidy up the underneath your tv area moreso than the PS3, and they keep on updating the software to make it do new and exciting things (for free!)
My two cents