From Zatz Not Funny comes word that TiVo owners are being notified their access to Blockbuster On Demand will come to an end March 31st, ending a run originally announced three years before. While this certainly affects TiVo's ability to offer the one box to search multiple services idea introduced with the Premiere, it could be more telling about Blockbuster's plans for the current incarnation of its internet movie service. As forum posters on TiVo Community point out, the list of supported devices is rapidl