I've heard a lot abut this and I know its putting a lot of people off. Has this been a problem for anyone? (has anyone seen the screen saying it needs to cool down?)
I haven't yet heard complaints about over heating. However during the previous version of iPhone there used to be different range of complaints about the over heating problems. This problems are more likely because of the defects in manufacturing them.
I haven't heard anything about this on the new iPhone, but it seems to me that I read something about it somewhere, probably with the old phone though.