This is concerning me too. I get the feeling PS is trying to raise the price. First they cut their free trial from 10 days to 7, now they’ve removed the option to purchase it for a year for $99. Three months for $45 doesn’t quite have the same ring. Man, I really wish I jumped on it when I had the chance.
UPDATE 12/5: This isn't anything special, but it's available for its regular price of $99 again, after being unavailable for the past two weeks. Not sure it's ever going to go on sale for $59 again, but it's #1 on my Amazon wish list, so I'll be watching...