It's hard to believe that Palm is already pushing its second device, the Pixi, out the door. It seems like just a few weeks ago that we were eagerly awaiting the release of the Pre, a phone that was considered to be the last gasp for the badly ailing company, and now it's poised to add an entirely new handset to the mix. The Pixi -- a sleek, tiny, webOS based device -- seems clearly aimed at the only market Palm has recently enjoyed unfettered success with: the Centro demographic. From the looks of things, the Pixi is positioned to step into the role of the "cheap and cute" smartphone once firmly cont