I'm happy i made the switch over to the iPhone, i do miss my 8100 and 8830, but the iPhone's interface is very easy to use, settings menu is very simple, icons make learning a smartphone a breeze. I was always very comfortable with the Blackerry Text Menu interface, i never had any issues with it...but i can see how some people would get frustrated.
Either way, keep your blackberry, the iPhone will be a great device to get if your eligible for an upgrade, worst case, sell the device you dont like.
I dont think youll have any regrets!
i3-2100, 8GB, 90GB Vertex3, 1.5TB HDD, HD6850OC, 23"ACER LED Monitor (Gaming Rig)
1.83ghz Macbook 1,1 (School work, Websurfer)
4GB Mini, 2GB Nano, 30GB Video, 8GB iPhone 3GS, iPad1
BB Bold 9900