No -- but that's a very interesting idea. Does it definitely have enough power to play back 1920x1200?
They work fine. When RaspBMC started, the menus were quite slow and it took ages to play video files, but now the latest version is very good indeed.
I havn't used it extensively, just played with it, but it seems very responsive, and will play HD .MKVs without any problem at all. You can also use it as a PVR (either by using a seperate TV Server, or by having a TV USB Tuner plugged into the Pi).
I would try to avoid using Wireless-N, for playing content across the network, but a couple of cheap home-plugs would work a treat (that is what I have got my Pi plugged into and it is fine).
The beauty is, they are so low powered that you can just leave them switched on all the time without feeling guilty or breaking the bank.
The Pi will work with quite a lot of remote controls out of the box too. I have a cheapo Cyberlink remote, and it works with RaspBMC out of the box.
Price wise, you need the Pi £35, power supply £6, memory card £10, remote control £5, Home-Plugs £25, HDMI cable £5. So you are looking at only about £90 all in.
You will also need to pay for an MPEG2 codec so that it plays non H.264 videos, but this will only cost £2.99 from the Raspberry Pi foundation website.
Robbo100