Red Superfly
You creepy little stalker
Even though that is a good point, I'd have to agree with the "Man-Spider" people on the webshooters. They were not a necessary change, and they could have been easily done.
Think about it, that bit where he was trying to use his organics on that roof, would have probably have taken as long as explaining the webshooters. A quick montage of him building the webshooters, and bam, done in less than a minute.
This is why so many people were angry with the film, because they (quite rightly) percieved a few of the "big" changes as totally unwarranted.
Back to the webshooters - Peter needn't have built them either. Uncle Ben could have been working on coagulating fluid and devised a pressurised container for it. This could have been at the beginning of the movie.
I think it's totally fair for people to hate on the film. Most people that went to see the movie, had watched the 90's cartoon (many of my casual Spidey who-only-watched-the-loyal-cartoon-friends were a little baffled by what the movie did), or read the comics at some point. The idea of Green Goblin wearing a flight suit, Spiderman having organic webbing, the lack of the famous radioactive spider are all reasons why people were put off.
I enjoyed the movie, but I know for a fact that that crazy budget could have been put to better use.
Also, to make things a little less aggravating, I kinda see the Spiderman movie as an alternate "universe" to the comics. Like how when Spiderman teamed up with five other versions of himself. Add the movie Spiderman to the list of the "alter" Spideys.