STM has made nice bags for years now, so it is exciting to see the company enter the iPad 2 case market with Skinny ($40). Combining a precision-fit hard plastic back shell with an articulating front cover provides considerably device coverage, save for the top and bottom edges of the tablet, which are unnecessarily exposed. STM includes magnets in the front cover, both to utilize the automatic screen lock feature and to hold the microfiber-lined…