Read the threads regarding "iRule", "Roomie", "Touchsquid" and others. All are tablet based remotes.
Personally I was going to avoid the tablet based remote because I wanted physical buttons for certain things like volume and play/pause, but the Harmony 1100 was the only one (cheap enough) that I found. Problem with that is that Harmony doesn't allow for macros. I needed a whole string of things to be done with certain button pushes and eventually feedback from certain devices (i.e., volume and input setting from the receiver or chapter and time from the BluRay).
I bought the basic license from iRule and have it running on my Droid X phone. It took me a little bit to "figure it out", but I have all the basics down now and am currently building remote screens for a Samsung Galaxy Tab 7 Plus that I will be buying. For me the phones are too small and the full sized tablets are too big. The 7" tablet is just right for me and they offer a dock for it as a charging station.
You will also need a few other pieces like a Global Cache interface box and a computer network with router.
My Build Thread:
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.