iPad Sling ($69) is the latest bag in blueLounge's Bonobo Series; it follows the Sleeve we saw last fall. It's immediately clear that they're part of the same family; not only are both made of the same recycled PET material, but the magnetic closure system and overall aesthetics are also very similar. The Sling has room for any generation iPad in the padded main cavity, plus a small pocket on the front for accessories. A cross body strap is attached…