I too agree with comments about people just feeling they have to be in touch ALL THE TIME - do they get lonley, can they not be out of touch for what in the scheme of things is a very short time.
As for the Crackberry the first time I came across one was in the Maldieves in 2003, as it skimmed across the water where I had just started snorkling - I thought it was a fancy calculator as it sank passed me !. Turned out to belong to some Master Of The Universe who had taken it on honeymoon, who,s then new wife decided after numerouse calls to test it,s water proofing - it failed, as I would put money on their marriage doing.