My setup is the following:

Ubuntu Server 10.04 and Sony Bravia EX500 connected on the LAN. I've tried to stream video over Twonky and it works great.

I would very much like to be able to capture the TV-stream on the server... I.e. setting up the server so that it can be used in the same way as a VHS-recorder. Preferable the capturing-system should have a LAN interface, so that I can setup TV-recording on the server using my laptop.

I've looked at MythTv and this seems to run on a desktop setup, with the TV connected to the PC... which is not the setup I'm looking for.

To summarize: How to setup up a "media-center" which can capture the TV-stream and can be interfaced over the LAN.

Any suggestions? Thanks in advance...