As many smartphone operating systems as Sony Ericsson is actively supporting simultaneously (three, at our latest count), its featurephone business continues to solider on, too -- after all, there's that whole Walkman brand to pimp, right? The latest models to break cover -- the oddly named Spiro and Zylo sliders -- were announced this week with the promise of bringing high-end music capability at an "affordable entry point," and considering the specs, we don't doubt that the company will be able to meet that goal. Starting at the lower end of the range, the Spiro offers a 2 megapixel camera along with a 2.2-inch QVGA display; the Zylo ups the ante with a 3.2 megapixel shooter with geotagging, a 2.6-inch display, 3G, and some advanced audio capabilities. Both models will hit "selected markets" early in the third quarter; follow the break for some promo video of both models in action.