Just like the initial run of TiVo Premiere DVRs two years ago, it appears that a refreshed version has been spotted at retail prior to any official announcement from the company. TiVo may be waiting for its official birthday March 31st to unwrap the new models, but a poster at TiVo Community has dug up listings at Amazon and JR.com showing the new TCD746500 TiVo Premiere with 500GB HDD retailing for $149 (with 1 year service plan at $14.99, of course). That can be compared to the original's 320GB drive that's currently selling at around $80. The listings hint at shipm
