Though the names are familiar from earlier Speck cases, these three new iPhone 4 designs each incorporate some interesting new twists on earlier themes. CandyShell Flip ($TBD) is an unexpected second version of the company's CandyShell case for iPhone 4, now with a flap at the bottom that's capable of rendering the otherwise accessory-unfriendly case more compatible with docks and non-Apple cables. SeeThru ($TBD) is a hard plastic shell with soft…
