I built the Turn Touch remote[1] to basically bring back the old Apple Remote features. Music and video control for your laptop.

[1]: turntouch.com

I almost never ended up using that remote, quite honestly. I got a lot more use out of the remote/stylus that my smartphone came with which I could use to play/pause media, take pictures from a distance, and obviously write or draw.

Yep, it was great. I used it regularly to give presentations, and many people were curious about the remote (where it came from, was it included, etc...).

Yeah had one with my first gen intel iMac. Great idea that was. The whole machine got used as an audio source regularly.