From Creatures Wikia
Although it was slow to be adopted by many sites, some sites, such as AmberCreatures, did make use of the system, which grew to over 200 members. However, the progress of Creatures Passport was no doubt hampered by the delay in the launch of Creatures Warehouse and The Creatures Forum.
The system is rumoured to be undergoing an overhaul, to relaunch soon as part of a new site, Norn Media. No details have yet been released.
Creatures Passport website (defunct - Creatures Warehouse was closed)