Camalen's latest is a bit of a spin on the normal folio-style case. Vision ($139), advertised specifically for the third-generation iPad, looks like many genuine leather cases and is lined with a soft material on the inside. The flat back rises a little too high, making the Sleep/Wake and volume buttons somewhat harder to press, and the bezel coverage is just a bit off center. Three leather straps on the inside of the cover allow the case to be…