And if you are a huge business person, where you email and talk on the same BB then when you are on a call you don't have to worry about not getting emails... Instead they come in right away and you can reply to them right away as well.
And also, you could be on a call and need to look something up on the net fast! While on the call open the browser and find that info 3 times as fast then compaired to EDGE all will on the call and not having to say I'll call you back so I can find that info.
There are HUGE benefits to having 3g with simultanious data and voice