Heard of Ingenic Semiconductor? Us either, but they’ve apparently started shipping a new processor for UMPCs called the Jz4740. They’re appearing in 3K’s new RazorBook 400 series UMPCs and are apparently ultra low-cost and low-power. The $299 RazorBook 400 was discussed yesterday, but we didn’t have the detail we do now. The proc is new and could — in theory — run Windows. Until we get more information, though, it’s just another mystery chip doing cool stuff for cheap.