Get yourself the Sky family package and this will take care of all your Tour De France needs. Eurosport are showing all of todays (wednesday) stage so I'll be sloping off from work as soon as possible.
However, some blocks of apartments cannot have Sky dishes stuck on their outside walls (like mine) so you have to go down the cable TV route. Companies like NTL provide Sky TV via cable and their packages are very similar in price. They also carry Eurosport, ITV2 etc.