All systems: Fedora 14, the latest release of the Red-Hat-backed Linux desktop, includes a library for handling JPEG photos that speeds up photo processing, thumbnail creation, and photo importing. There's also support for better control of remote desktops and virtual machines.
Those are the two major new user features in Fedora 14, but there are all kinds of upgrades to the core apps, desktop components, and background Linux technology, of course. You can read up on what libjpeg-turbo and the SPICE interface for handling virtual machine and remote desktop interactions, and otherwise dig into what's new for everyone at the announcement page. Beyond that, it's the same powerful, customisable Linux desktop we've come to know and respect.
Fedora 14 is a free download for Intel and PowerPC-based systems that should run most everywhere.