There is http://www.linuxmce.org/ , have you seen that?
perhaps mythbuntu is what you are looking for:
Youtube demo:
http://ca.youtube.com/watch?v=b-yNCqj_MXs
http://www.mythbuntu.org/
please use a more descriptive subject in your posts - Thanks.
mb.
could try elisa media centre
http://elisa.fluendo.com/
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