There've been internetweb rumours about the Palm Centro smartphone for a while now, but yesterday it was officially unveiled in the US. It's a compact-looking handset with a full QWERTY keyboard, and is aimed at regular folk rather than business users. The big thing is the price: $99.99 in the US, where operator Sprint has bagged a three-month exclusive on the handset. Besides that keyboard, the phone runs the Palm OS, and has a touchscreen, Bluetooth and support for push email and instant messaging. The camera's only 1.3-megapixels though, which is disappointing for a consumer-focused smartphone.