TUAW readers who are into collecting Apple devices are going to love this eBay find: a prototype of an unreleased product from 1993. The Apple WALT (Wizzy Active Lifestyle Telephone) was introduced at Macworld Boston in '93, the same venue where the ill-fated Newton MessagePad first went on sale. WALT, like Newton, also had a touchscreen, a stylus, and handwriting recognition. It was designed to be a companion to a home landline phone, and was designed in cooperation with BellSouth. Built into WALT were services like an add