Don't do it. "cable" is 75 Ohm... 10Base2 == 50 Ohm and its a chain not a star and break breaks the network. and It sucks. If you run new cable... just run 4 pair.
Its far better to run copper 4 pair CAT5e/6.
Unless you are going to do 802.11N.
Do 802.11N, put a card in your computers or make sure your laptop speaks it.
The Multimedia over cable stuff works but is pricey and still in transition.