This is a great idea.  Interesting features should include holograms and molds/dies commissioned from the community's favorite artists.

The best way to make a coin like this would be allocation of access to different versions based on rank.

Of course the coins must have "I AM HODLING" repeated around their edges and their owners' forum rank inscribed somewhere. 

All versions would have the same front text, which would state the obvious


and feature our motto:


and, in a smaller inscription


The 3 versions should ideally be as follows

Regular:

(imagine using a gray metal for the black parts and gold for the white bits) 
Back design+sticker by Cryptopods + OGNasty.
Value of 2,100 Satoshis on 1oz copper (black ruthenium-plated with gold accents that will look sleek af)


Hero:

Back should a Crypto Imperator hologram on a Kialara die. 
Value of 21,000 Satoshis on 2oz high relief silver w/ gold-plate accents


Legendary:

Back: collaboration between Mike from Casascius and smoothie from Lealana; one designs the hologram and the other sculpts the die.
Value of 21,000,000 Satoshis on 5 oz of silver w/ gold-plate accents


All the drama around this project just makes it too perfect for Bitcoin Talk.  Would we want it any other way?

This reminds me of something I wrote long ago and can't find now, perhaps it should also be on the coins?