Join sky for $50 for 6 months?
That's a $300 outlay, and for me, it's not worth the spend, given there's nothing else on Sky that I want to watch. The nice thing about Fanpass is that I can turn it on and off at will, so I only pay for about 4 months a year in total. I'll make do with the Prime coverage if I can't get the Olympics any other way. Or go to my parents' house and watch their Sky ;o)
Pity FanPass doesn't have the Olympics on it but I guess Sky would want to give it away cheaply as they would rather you sign up for 6 moths plus a MySky.
SS 3 and 4 have it, Prime has about 9 hours a day live, hope its reasonably watchable.
SS3 and 4 are about 7-12 hours per day per channel live (it varies across the duration of the games) with the rest being replays or delayed.