Links & Friends
Synodonitus, Plecs, Corydoras, L-Numbers
Excellent site for Catfish ID whether through their ID forum or by reference to the hundreds of catfish photos. No fee to join. Some extremely experienced catfish keepers and breeders frequent the forums.
Zebra Plecos (L046)
Site dedicated to Hypancistrus zebra. Fairly good forum, but I would go to Planet Catfish first.
Reference site for ID-ing and breeding information on Corydoras catfish. Membership fee is £15 but you have limited access for free. Well worth it if you are big into Corys.