As already mentioned you can get the files onto the PC, and I have also heard of this freeware decrypter. Not seen the thing myself, but ive been told that its slow and not the most stable.
Best way if you want to get a PVR and be able to get data off it is to get a combined DVD burner/PVR, or - as I have just purchased off ebay - a TiVo box
the boxes go for about £150 now with no subscription or £300 with a lifetime one, then you can add in a network card for various prices and use one of hte hundreds of hacks to stream the tivo recorded programs to your PC
TiVo can also have its hard drives upgraded simply, just a case of flashing it with the tivo firmware - tivo can even support up to 2 120gig drives with minimal effort
much better than sky+
imo