I ordered My fusion SEL on february 21st and I'm still waiting. It was supposed to be built May 2nd and I called Ford Customer Service about a week ago and it is in transit. Delivery is scheduled for May 23rd, but my dealer said it could be early or late, that it just an estimate. I'm crossing my fingers it is here on Friday so I can have it for the weekend, but not really counting on it. My parents ordered an Edge Limited the week after me and had it by April 16th, so it just depends on the plant I guess. I heard mine might have been delayed because of some parts being backordered (someone said V-6 engines, but I'm not sure on that...I ordered it with just about every option available so it could be many things) and they also had a plant shut down for retooling for the 2012 models the first week of April. At least that's what I've read on the forum. I lucked out that I didn't order black or red because I had heard they had some problems getting the pigment for those colors because of Japan's earthquake.
As for this year's model, you can't order any more 2011 Fusions...I was told I barely got mine because they weren't taking any more orders and I'm not sure when you can start ordering the 2012. I know it's not listed on the web yet. I'm guessing you'd be looking at July or August before you could get a 2012, but I'm only speculating based on things I've heard in the past. Hope this helps some! Maybe someone can jump in and give you better info on the 2012's.