Why doesn't AMD offer any recent drivers for the Mobility Radeon HD series (in my case a HD 4570) like Nvidia does? The drivers Dell provides for my Studio 1555 are really old and I doubt that they will release any newer versions...
Next months 10.3 Catalyst are supposed to support laptops. But there are a few manufacturers that have blocked ATI from releasing drivers for thier laptops. e.g Sony, Toshiba, and Fujitsu