Bought a Mac Mini from the brand new Apple Store in Perth yesterday, including Apple Remote (infrared).
I have got basic functions working from Logitech 525 IR remote as well, and also using Mobile Airmouse Pro running on iPod Touch (via wi-fi). The Airmouse software is quite good, e.g. for simple surfing to find and run online video.
At the moment, I have a Logitech USB wireless mouse and keyboard plugged in for more complex typing . Time will tell whether I can do without a full size keyboard long term.
One trick I found with the Mac Mini. Initially, I didn't think it was sending audio over the HDMI port, as I couldn't get the audio via the TV. However, I had to change a setting under the Sounds preferences to output the audio via HDMI rather than the Mac Mini's internal speaker. The audio works fine via the TV now. I retained the setting for system sounds via the internal speaker so various beeps, etc. are not frighteningly loud when the TV volume is turned up.