Just from what I've observed...

Sean - inactive.
Unne - active.
Scottie - moderately active.
Rydia - active.
Gareas - active.

Proto - active.
Gau - don't see Matt around so much these days.
BOU - active.
Mr Rocko - moderately active.
Master Vivi - moderately active.
Wyllius - don't see him around too much either.
RSL - once in a blue moon.
Kishi - active.
ShlupQuack - active.
Darly - inactive.
Guu - active.
Loony BoB - hyperactive.
Roogle - active.

Phew...