I'm really too busy right now to do this, but someone else mentioned something I'm inclined to believe is true. The message Apple is now showing says "SONG FILE NAME was not copied to the iPhone "YOUR IPHONE" because it cannot be played on this iPhone." This is similar to the message you get when you have an otherwise perfectly fine video that iPhone/iPod will not play. Maybe I'm grasping at straws, and I really wish I had the time to test it, but a few things occur to me.
1. Apple only allows optimal formats for video to play on iPod/iPhones
2. Ringtones were not being constrained in ANY way
3. Apple only allows 30 second ringtones to be made when purchased
Everyone's been reacting to what they're thinking is Apple shutting off all their custom ringtones, when in fact, we might be seeing something much much more benevolent and responsible. Apple might be limiting the sound and audio formats for the ringtone by length and quality. Limiting length to no greater than 30 seconds (like their own), and the sound resolution to something that isn't equally perilous to performance. If someone could test out a few scenarious and educated guesses about this, it'd be great.
Prior to now, I was thinking... Wow, Apple is being really really sloppy. They're letting people play almost anything to the point of making the iPhone freak out on performance. I don't think that's so good an idea for them.
~ CB