Palm's latest smartphone, Centro, is meant to be a mainstream phone for users who are just switching over from a traditional phone to a smartphone. At least that's the story, according to Palm. And we are inclined to believe them. Centro is available in Ruby/Onyx colors with a sleek form factor and a somewhat Pearl-like appeal. Unlike Palm's previous conservative models, the company is definitely looking to rock the industry with a smartphone that's screams sex appeal. If the Centro doesn't excite you, then your expectations are out of sync.