[raamdev]

As a former 5-year, very satisfied Blackberry user who switched to the iPhone 3G last June, I have this to say about the comparison:

For business use that requires lots of replying to email, management of large volumes of email, copy/paste functionality, and the possibility of integration with existing Enterprise systems, the Blackberry is a must.

If you mostly just need to read email and only occasionally reply, you have a moderate volume of email (< 30 per day), and you are more interested in a device you can have fun with on the train and use as a replacement for your iPod, then iPhone is perfect. The apps available on the iPhone are truly killer. Real, playable games that you can fully enjoy. Also, web browsing on the iPhone is beautiful -- sometimes I find myself using it in front of my laptop!

I've convinced both my boss and my manager NOT to get an iPhone and to instead upgrade their phones to either the BB Curve or Bold. They both thanked me afterward when they realized just how much they relied on easy email reply and the ability to "mark as read" multiple messages (come on iPhone!). The iPhone is definitely a more media-centric device, whereas the Blackberry has been refined for the specific needs of business users.

[dmix]

I recommend an iPod touch and a Blackberry Curve, you get the best of both worlds.

I love Blackberries keyboard for sms/email and ipod for productivity apps (omnifocus)/games/music.

[raamdev]

I can definitely see how that is the best of both worlds. In fact, I thought of doing that before I bought an iPhone, but carrying around fewer devices is more important to me than having a perfect keyboard.

Also, being able to listen to music (with a standard 3.5mm headphone jack, btw) and not worry that I'm missing calls is invaluable (the call just interrupts the music).