You'll all laugh at this...My wife just came home tonight with an AT&T Tilt from a company called HCT. Just for a reference I have the iPhone which I like as a whole but wish the touch keyboard would turn sideways when you turn the phone to make the keys large. Other than that I've been happy.
Now this "Tilt"...First of all it is a BRICK and seems to weigh 5x that of the iPhone. Next, the thing has buttons all over and after playing with it for 1/2 hour I could barely make a phone call let alone figure out the email or browser. This thing is about as anti-intuitive as it gets.
Sure it has a TON of bells and whistles, voice command, touch screen, button or pen. A real keyboard as well as other things the iPhone does not have.
Truth is someone who never used an iPhone could work the entire phone in 5 minutes without even looking at the manual. I was frustrated in half that time with the Windows based "tilt" and I'm a PC guy using Vista.