YEG-SFO? That's a new to me. Like Lubicon said, it's only seasonal. Probably either it's a trial run or AC's trying to capture the leisure rather than the business travelers' market, I'll bet. Although AC may (or more likely may not) extend it to year-round service, I've lost faith in AC's strategy.
There may be a reason why AC's been cutting so many flights, including YEG-YUL and YEG-ORD: money. I've read in an article in the Edmonton Journal about YEG's loss of AC service to these two cities. According to the article, AC has said that it is more profitable to route passengers through YYZ. And this move coincides with AC's plans to keep its growth at zero since the merger and fuel price rises have eaten away at AC's profits. Not to mention the serious competition that's sprung up like grass in wet weather.
Still, I think AC's priorities are a little screwed up right now, and I'm certain that YEG's not the only airport in Canada getting pissed off at AC.
Toronto-Greenville, SC? I doubt this will last very long. At best it might be reduced greatly. Toronto-Charleston, SC looks much better since Charleston, SC is a tourist destination for its Old South historical charm and the subtropical climate. Norfolk's not a bad idea, either. YVR-MIA and YUL-LAS should do okay, hopefully. I think AC's already got plans for YVR-LAS, YYC-LAS, YVR-PHX and YYC-PHX fairly soon.