Has anyone had a sidekick and a blackberry curve?
Which do you prefer?
Yes, I've owned both phones, but which phone haven't I owned
At any rate, you need to be more specific, which model sidekick are you looking at. Do you have T-Mobile (they ONLY work with T-Mobile), what are your needs?
If you're needs are simply texting, web browsing, and a phone- then sidekick hands down.
If you need up-to-the-minute pushed email, go with the blackberry.
Personally, I hate the design direction RIM is taking, their keyboards are really... really horrible these days- almost reminiciesnt of those found on Treos

Whereas the Sidekick has one of the best keyboards found on any phone.
So in conclusion, which phone is superior?
Well, the iPhone of course!
Which phone would I choose between the two? Sidekick- hands down.