Macally's new Hardshell Flexible Case for the third-generation iPad ($50) is a folio-style option that offers a bit more protection than many plastic cases, somewhat resembling Speck's CandyShell Wrap. It's made up of a contoured rubber and plastic shell with a trifold front cover. This lid doesn't detach from the Flexible Case, but it does have an automatic screen-locking magnet that nonetheless requires a latch to stay shut. The shell offers full…