Transmog collection rankings

[Sting]

Is there any website where I can track and compare appearance collections in a wowprogress sort of way? Sort by class, server, etc?

[Nathanyel]

I doubt you can determine Collection counts via the Armory, other than the (in this case trivial) Fashionista achievements, so it would require user participation. I'm sure Wowhead could cook something up using their Profiler data, but you'd have to convince them it's going to be a popular feature to justify the programming effort