I've been searching for a small, very small, keyboard with a trackball that is connected and powered via USB, I don't want wifi or bluetooth. I've found some that are close to what I was looking for that are for use in cars, not exactly what I was hoping to find though. I also found some cool stainless steel industrial bolt on keyboards, but could never find a site actually selling them, or a distributor for that matter. Then I came across the app for Blackberries that allows a Blackberry to be used as a computer keyboard through either usb, bluetooth, or wifi. Since I already have a Blackberry that I don't use, the price works great for me.