Really good. Some advice...
I've been working on flash since about the exact same time as you and I can see the great deal of effort and detail you put into this. ^_^ This is a great animation.
Still, in terms of constructive suggestions, I'll bring up some issues. The detail was not even distributed throughout the movie. For example, the garbage trucks wheels--even while going down the road--never moved, never turned. Whereas, the windshield wipers were going back and forth despite the absence of rain. Another example would be the amount of detail taken into the binman's walk cycle when compared to the amount of detail taken into the "You're Gay" neighbor's.
Another thing I noticed was that as the movie progressed, the effects became much more advanced and precise. The lighting in the last few scenes was excellent! However, the first couple of scenes paled in comparison. This is usually a sign that you spent a long time on this project and refined your art all the way until completion--however, you didn't take the time to go back and add that same level of detail to the opening scenes.
Still, to end on a good note, this was the best animation I've seen today. The animation was fluid and the camera angles were great. The ending was a bit of a cliched cop-out, but the animation wasn't driven by story--as much as by atmosphere--which IS original. Good job.