A notice in the TiVo for iPad app has validated hopes that it might come to Series 3 DVRs. A quiet update to the app on Monday (free, App Store) is now producing a pop-up message that tells users that full support is coming for set-top boxes provided by cable providers RCN and Suddenlink as well as "limited support" for the Series 3 and related TiVo HD. The update is "coming soon," it said.