Filed under: Home EntertainmentWe've already heard about some of TiVo's plans for two-way communications, and it now looks like the company has used its third quarter earnings to drop a few more hints on the matter, including word of what sounds an awful lot like a Series 4 box. According to TiVo, it and the cable industry have come to an agreement on a "blue-print for a retail TiVo DVR" that would be based on the OpenCable Application Platform and have "full two-way cable service functionality." In less cryptic words, that me