iFrogz has updated its Summit, which was originally released for the iPad 2, with a new version for the third-generation iPad that sells for the same $60 price tag. Both models closely resemble SwitchEasy’s Canvas, using a fabric-coated hard plastic shell to hold the iPad, plus a cover that wraps around the top of the shell, while leaving some of the plastic showing. The differences between Summit and Canvas are relatively minor. Here, the cover…