Intel may have launched its Ultrabook platform with a demo of ASUS’ UX21, but that’s not the only Ultrabook at Computex this week. Lenovo has brought along the IdeaPad U300s/U3s, NotebookItalia spotted, a slender Sandy Bridge ultraportable channeling the style of the IdeaPad U260. Hardware specifications are unknown at the moment, as is release date and pricing, though of course Intel ...