If you're over 30, you might as well stop reading this review now. As a 34-year-old geek, I've had trouble getting into the Sidekick mind-set. That's the mind-set of someone who would pay up to $200 extra to buy a phone emblazoned with the logos of pop-culture figures you may not have heard of, like tattoo artist Mr. Cartoon or basketball star Dwayne Wade. The Sidekick 2008 is a fashion item and an expression of identity, not a geeky toy. And its best feature is its case, or rather, cases: This is the first handheld to offer completely customizable, interchangeable shells.