Along with a pair of shells for the upcoming fifth-generation iPod touch, XtremeMac has delivered its new Tuffwrap Play ($23) and Tuffwrap Tatu ($TBD) cases. These are more fully protective rubber skins with coverage for the iPod's back, top, bottom, and sides. Each case has separate cutouts for the bottom speaker, Lightning port, and headphone port, as well as openings for the rear camera and loop button. Play has distinctively raised back grips…