Following up what the other poster already said. They both do all the same things -- I'm confused why you think it's a joke. I have a Blackberry Curve through work that has a 4gb microSD card (was only $40) .. has a media player for music/video, acts as an external drive when I plug it in and I can throw videos/mp3s/photos on it. It's actually easier to manage files in that regard than my ipod touch.
At least where I live, in silly-con valley, I know just as many "consumers" with blackberries as I do people with corporate blackberries.
-K
Blackberrys are the standard in business. The iPhone is a GREAT device, but not so much as a business device. The iPhone has three BIG things working against it to make it any type of competitor with RIM. #1 is email. No one can hold a candle to RIM's email service. I use mine for 3gmail accounts, and 1 exchange. My mail hits my 8830 sometimes a few minutes before it will hit my desktop. The iPhone can't touch RIM when it comes to email. I work with top level execs that are getting hundreds and hundreds (up to 1000) emails a day that they handle on their Blackberrys.
The second BIG thing the iPhone has working against it is it's camera. That counts out every lawyer, government worker, secured building employee, etc. That is a HUGE amount of people.
Third is it's security software. The iPhone is obviously not a secure device no matter how you slice it. Blackberrys have all sorts of security varification available, and IT departments can administer, monitor, and push out updates to them. I work very closely with people in the banking business, and their computers, blackberrys, etc are locked down tighter than you would believe.
These are just three things of which any one of them would count the iPhone out of the corporate world. Is it a great device? you bet! can it hold a candle to RIM devices in the corporate world? not a chance.
Like I mentioned, I work closely with high level execs of one of the largest securities firms in this country, and we run meetings with hundreds of people at them. Every single person in that room has a blackberry that is company mandated, company controlled, and company supported. A lot of them also have iPhones for personal use, but the company won't even touch them.