Its a free download for the iPod Touch and iPhone from the app store. Its much better than the horrible little creaky white plastic remote but now that I have a Harmony that does it all I never use it.
As good as the interface is on the Apple TV its still going to take more than a remote overhaul to make it more than a niche product. I use it to watch video podcasts, watch the occasional trailer and to stream music. I like it OK, but I would never recommend it to anyone else without serious qualifications.
Boy Genius has a possible pic of a touchscreen appletv remote control.
Interesting design, except for the fact that TOUCH SCREEN REMOTES SUCK, lol (I have a harmony 1000, btw)
but interesting nonetheless... thoughts?