You do know that ZeroCoin is a protocol change to *coin?
It's not designed to be it's own crypto- currency unless the dev team has run out of patience with it being adopted and decided to fork.
From the github page:
Zerocoin: C++ lib for anonymous extension to bitcoin
They stated that they intended it to be its own coin now - zerocash, iirc. Of course it could be rolled into *coin later.
I also saw that their next paper update should be available shortly (end of Feb, supposedly, from their twitter account).
:-)