Just wanted to add myself to the list of incredibly unsatisfied customers.
I feel that Apple have purposely made my older less powerful phone, very obviously feel like a less powerful old phone in the hopes that I will update to the new iPhone. Well, I'm here to say, I will not buy a new iPhone 4.
Not if I'm backed into a corner.
I've had countless issues with my phone since upgrading, the worst of these problems being that I can no longer use the phone like a phone. I've missed about 5 calls due the unlock sliding bar freezing up, I've noticed a significant increase in the amount of calls randomly dropping out, typing text messages seems sluggish and occasionally the keyboard becomes completely unresponsive. If 4.01 doesn't fix these issues I'm jailbreaking this sucker, downgrading back to OS3 and Nokia is going to make some dosh the next time I feel the need to upgrade. Because unlike the iPhone, my 8 year old Nokia works just as well now, as it did the day it came out of the box.
I read this post on apple support and I think this guys analogy is really good
"I want to add another iPhone to the growing list of what I deem as damaged due to the OS4 upgrade. Seriously, if a car were taken to a mechanic for a tuneup and returned with half its performance, I would say the mechanic damaged my car."
http://discussions.apple.com/thread.jspa?threadID=2471047&start=270&tstart=0
Also, make sure you guys are leaving your comments somewhere Apple actually read them.
http://www.apple.com/feedback/iphone.html