Yeah, Safari crashes on my 2G/original iPhone a fair bit - particularly on websites with a lot of photos. Like
http://icanhascheezburger.com/ among many others. But sometimes, it will just crash for no apparent reason.
So while we are on the cons:
No cut-n-paste. This is just an annoyance that they should be able to fix and I don't understand why they don't. It would be handy to be able to email links to things without having to write them down and then type them in.
No turn-by-turn GPS. Another software issue that I can't figure out.
No removeable memory cards - it's Apple, I should expect it, but I don't have to like it.
No removeable battery. This will be a real issue in a couple of years when all the iPhone owners have to get their lithium-polymer batteries replaced. And replacing it yourself on the 2G phones requires a soldering iron.
The camera is only marginal - it's not horrible for a cell phone camera, but the photos that iPhones take are not good enough to allow me to leave my real camera at home. No autofocus, no flash, not very high megapixel count, not very good at taking pictures in dark locations.
No bluetooth or WiFi sync'ing - some 3rd party apps help with the WiFi part, but I still haven't found a way to just have my phone auto-negotiate and sync wirelessly with my laptop when they are nearby.
No stereo bluetooth
Needs iTunes to sync and only sync's with one computer at a time - so if you have a work computer that's Linux, or that you can't run iTunes on (for security reasons for example)
Security is not good enough for most corporations to certify for internal use. I know a lot of major companies who don't think the iPhone is secure enough to be used for internal communication
And then, it has no keyboard, no MMS support, can't edit MS Office apps (only view), and isn't unlocked.