With the Ubuntu variant Mint roaming free as one of the more attractive Linux breeds, why not lock it up in its own mini-case? That'll happen soon thanks to mintBox, a joint venture with CompuLab, which will put the OS in two of its fanless PC-3's -- the T40N and T56N -- priced at $476 and $518, respectively. That might seem steep for the tiny 6 x 6 x 1-inch AMD G-series boxes, but with a Radeon HD 6290 APU and USB 3.0 / eSata ports,