First, good luck with MythTV on a Mac.
You can use any IR remote - and you won't be teaching it any IR keyboard codes. You will need a USB IR receiver to connect to the mac and then a driver for it. You'll also need the ability to set up the driver to respond to specific commands. Those commands can then be anything you want from the IR remote.
I don't know of any USB IR receivers off hand with Mac OS X support unfortunately. That is, any that let you use your own remote. If you want an IR remote that you can't use for anything else, then you can get a Keyspan IR remote or even one from Elgato.
Here's something interesting I found though. Don't know how robust their support is for the remote though:
[Link: homepage.mac.com]If you want to get your hands busy writing code yourself then
http://lirc.org is the first place to start.
At this time, Remote Wonder for the Mac is your best option for control of the computer alone. You also have three choices of handset. Original, RW2 and RWPlus (support for this one is coming in a brand new release of the software very soon - with plenty of new features).
Bruno
This message was edited by TwistedMelon on 07/17/05 11:47 ET.