In addition to its new Z750 HSDPA phone, Sony Ericsson yesterday announced a new addition to its powerful Walkman phone lineup. The W580 brings some smart styling to the company's Walkman phone line. Available in white or gray with orange accents, the W580 features a slider design, which is still a somewhat rare design for the company (the last slider Walkman phone we reviewed was the previous W850). And at 0.6 inches, it also marks a further move by the company to compete in the thin phone craze. Inside you'll find stereo Bluetooth, a memory stick micro slot, a 2-megapixel camera, song ID capability for identifying unfamiliar music tracks, quadband world phone support, and an FM radio. Stay tuned for our complete Sony Ericsson CTIA photo gallery.