Our keen eyed friend Dave Zatz spotted an offer that popped up on TiVo's homepage over the weekend, offering customers the opportunity to obtain a TiVo Premiere DVR for zero dollars down, with the caveat that they would be locked into paying $19.99 a month for service for the next two years. That's a slight bump over the regular $12.95 per month (currently offered at $9.95) service fee, but nothing unreasonable if you do the math. Getting a $299 box for an extended $240 payment over two years sounds nice there is one gotcha here -- after the two years, customers are automatically resub