Currently using a Motorola Droid and I have to say the android operating system is awesome!!!!!!! I was using a blackberry tour before I purchased my Droid, I loved the blackberry too but I read about how much customization you can do to an android phone and I was sold. Currently, my Droid is rooted and I'm running a red theme with options for overclocking the cpu, these sites www.droid-life.com & www.droidforums.net have tons of info, tutorials and tips........