How can I use a tablet as a remote control?

Episode 1396 (1:03:14)

Richard from San Rafael, CA
iRule Remote App on iPad

Richard would like to only have one remote control. He has a Harmony 1000, and it almost does the job, but it doesn't have a TV guide that can pop up. Is there a remote that can do that? Or can he use a tablet like an iPad? Scott says he'd have to have something in between that could take the Wi-Fi signal of his iPad and then transfer it into an IR signal.

Dijit is recommended by Gizmodo. iRule is another option. Scott doesn't like a touch screen remote, though. He prefers physical buttons. But sometimes you just need a screen.