I've loved my BlackBerry Curve. I hardly ever have to reboot it like I did the Motorola Q9h. Some people may complain about the 2G network but I never found that I wanted to browse long enough on that screen for the network to make a difference.
It's sad when you get so old that you look forward to the the hand-me-downs from your children. My son-in-law has been one step ahead of me in cell phone gadgets. He had a Treo 650 before me then when he went to a BlackBerry Bold I followed with a BlackBerry Curve.
Now he's gone to the iPhone 3GS. I'm holding out for a GSM Motorola Droid (Milestone?) but he passed on his Bold to me.
There's a great comparison here.
The Bold compared to the Curve is a tad larger at 4.5x2.6 vs. 4.2x2.4 and .8 oz. heavier.
But that screen! It's the same size as the Curve's and clearly smaller than the iPhone 3GS' but the resolution is what makes a difference. Not only is it brighter with more contrast than the Curve but it is 320x480 compared to the Curve's 240x320.
It runs BlackBerry OS 4.6 like the Curve but has Visual Voicemail. I had to call AT&T to get this provisioned on my account. There's no charge for it.
My son-in-law had had this Bold connected to his work e-mail so I had to remove the IT policy. I used BlackBerry's JL_Cmder to do this. It took 10-12 attempts to get it to "connect" so keep trying.
One of my projects is to tether a laptop to the 3G network via Bluetooth. That'll be fun.