Sold as an alternative to the earlier Showcase for iPhone, Contour Design's new clear hard plastic case iSee iPhone V3 ($30) offers improved part-time port protection, full-time top and side button coverage, and a new frosted clear holster as enhancements to Showcase's more open sides and black plastic holster. Also changed are the rear belt clip, which now detaches and can be turned in your choice of four directions, and the thickness of the case,…