You will still need to keep your Sky viewing card. If you stop subscribing on a Sky contract, you can keep using that card to watch 5USA, 5* and PICK TV, the so-called "free-to-view" channels. (All ITV channels are free-to-air).
The only way to get signals to more than one receiver from a single LNB without separate cables is to use a distribution amplifier as sold by the likes of Labgear, etc. Splitting a satellite IF feed *does not work* and as MikeB says could well risk the LNB being irreparably damaged.
Satellite signal feeds from the LNB are *not* the same as the signals from a terrestrialaerial as used for Freeview. With a terrestrial aerial system you may be able to divide the signals to 2 or more TV sets, with some loss of signal strength. You cannot do the same with satellite signals.
Brian: To my knowledge the answer is NO, as although when the TiVo box was initially launched it was reported that this could be done via the USB port, this later being denied, the purpose of USB port mentioned as being for a keyboard.
The only way of transferring programmes from the TiVo box is via the scart or HDMI cable onto a DVD recorder of the hard drive variety, the snag being that it can only be done in real time.
no one said anything so I will repeat Save your money, Ditch Sky TV and just watch Freeview and save some real monies. Just think it will mean more monies in your bank . In the past people only had two channels and they survived :)