Apple building 13 inch and 15 inch tablet in addition to a 10 inch model – upnextwirelessblog.blogspot.com 08/28/2009 We all certainly remember what happens when sites doubt Gizmodo’s “reliable sources” — Steve Jobs’ health, anyone? As such, a particularly interesting rumor emerged this morning that Apple tablet hopefuls might want to take note of. Citing “a source that has always been 100% reliable”, Giz claims to have been informed that Apple is currently working on 13-inch and 15-inch