i had a blackberry 8703 on Verizon before I came to AT&T for the iPhone... I had it as a spare for about 8 months and it was alright, I grew to like blackberry more than any previous phone. Once I played with an iPhone though I was sold. I basically have fetch email every 30 minutes, SMS, AIM, Package tracking, EBAY tracking, Facebook, 3G, i mean.. for ME personally it suits me better.
I don't need instantaneous email delivery, and if I did i'de buy mobile me. The UI is what matters most to me, and I've never used a phone that was more intuitive.
That being said, the bold does look nice. For sure a nice phone, and if the iPhone had never released I would probably be all over it. for my needs personally though, the iPhone just works.