I use it to control my myth frontend - it works great for that. No IR hardware needed, it works through a telnet connection to the machine.

I'm at work right now so I don't have the tablet or remember the exact steps, but basically you need to enable telnet control of the frontend (in the frontend, select Setup - General - General I think ), open up the port (6549 or something, it says it in the frontend) in your firewall and off you go . Just create a new remote and set it to control myth - you'll see the options in the program. Very easy.

Like I told eXeonical above, I have a remote setup for this and can of course send it to you if that'll help. I was thinking of fine-tuning it a bit by at least properly lining up the icons and such before sending it out to him. Nothing special and you can make one for yourself with all the same buttons in a few mintues but yeah, it works well. I have ESC, OSD, UP/DOWN/LEFT/RIGHT, VOL+/VOL- and aspect ration buttons on it. Real handy.