To a normal user, not an admin type... almost absolutely nothing listed in this thread will make an iPhone user drool with envy. Not a single one.

Want to make an impression? An all black screen with tiny white text that you can basically sudo, rm, ls and what not will not make sense to the average iPhone user. In fact, they'll not even begin to grasp what you're talking about because they have no reason to be in those areas on their desktop machines.

Trust me. I'm an N810 owner and I'm an iPhone user - but I'm not part of the Cult of iPhone/Cult of Mac type despite also being an OS X user too. The N900 is a powerful piece of kit. The Skype integration, as well as the IM integration is top notch. Multi-tasking, TRUE multi-tasking... is top notch. The home screen alerts... beats the snot out of the "push" alerts on the iPhone.

Bounce would be a great game to show the iPhone users that love games. Angry Birds is also on the iPhone, but show them that.

Want to really show off? Play a real movie in the N900. The screen just absolutely kills the iPhones. Even optimized movies (to me) have ghosting on the iPhone to a point where I do not watch any movies on the iPhone.

Then the browser. That was what had people shocked the most. Forget forcing websites to display a mobile version of a site. You get to see the full, flash enabled site in its full glory.

But I'm addressing the "average" iPhone user though... not the savvy ones. And be careful, some semi-savvy people know of VNC on the iPhone, as well as jailbroken iPhones (which is a hack) that have SSH and Terminal... but then you're no longer dealing with a typical iPhone user.

Oh... and final thing. A camera with a flash. Yeah... that kills what the iPhone has. Easily.

But terminal stuff... heh. I mean it's exciting to the geeks that use it and know what the heck it is; however to most laymen it's nothing more than an over-glorified DOS prompt.

But I will say that the N900 is already strong enough to make most people go wow anyway. And if they don't... they're hiding it from you anyway

Good luck with your endeavors. You'll probably field more questions from iPhone users than most others.