I’m not a Blackberry user. So, I was quickly reading through MSNBC’s Gary Krakow’s review of the new Blackberry Pearl from T-Mobile until I hit this sentence in his review: Aside from its size, Pearl’s best new feature is its revolutionary pointing device — a tiny, full-function trackball. A trackball makes so much sense. Every smartphone needs one for navigation. And, every phone peripheral maker should add one to their Bluetooth or Infrared wireless keyboard.