Pots/Encoders with LED Rings?

What’s the feasibility of using pots/encoders with LED rings to show the value of the parameter or the knob. This type of visual feedback is great and it looks great. The best example I can think of is on the Moog Phatties.

Anyway, would this be possible on the Mutable Instruments platform (maybe someday)?

I know this topic. I was diggin the sparkfun link on the other forum. That could be neeto.

Very unlikely in the current state of things (affordable kits, DIY-friendly designs, low-volume production).

you can build your own midi controller with led rings:
Midibox 64E

Or buy one from Novation (although I never got their Mk1 to work properly)