From United SGP comes another Smart Cover-compatible shell for the iPad 2: Harmonie ($33). Unlike the company's Griff, this one isn't made of leather but rather is a more conventional hard plastic. Coverage isn't bad, but there are some areas which could be more protected. Along the top, right, and bottom edges there are openings for the inputs and outputs, while a thin strip of the tablet's aluminum back is left exposed on each side. Instead of being…
