Lenovo just unveiled its new IdeaPad U510 Ultrabook, yes, but it has a few new IdeaPad models further along in the alphabet, too. Today the company is introducing two new entries to its multimedia-focused IdeaPad Y Series. The 14-inch Y400 and 15-inch Y500 include an interchangeable HDD bay that users can swap out for dual graphics chips, extra storage space or an additional fan. Both models also sport dual-layer backlit keyboards, with a
