I think the coin should look more digital and bold to greater emphasis the name particle.
Take this for example;
http://vimeo.com/44083487Using that sort of effect for the outside of the coin, someone with good photoshop skills could create a coin using particle-style effects that would look amazing.
The "P" Would also have this particle effect, perhaps in a different colour to stand out. If you can picture that, then that's how the coin would look awesome.
I actually like this idea a lot. I don't really see the need to make it look like a physical coin. Perhaps it does need to for the more mainstream audience. However I still think the particle effect would be cool if done right.
