Here are links to forums that focus on Streptocarpus

Streptocarpus-info Forums

AVI Hybridizing (Focus on hybridizing)

AVI Streps (Focus on Streps)

Gesneriphiles (Focus on all Gessies)

Gesneriad Society (Focus on all gessies)

Streps for Fun (Fun group focused on strep growing)

Streptrade (Focus on trading streps)

Variegated Streps (Focus on variegated streps)

Please let me know if I am missing any! Thanks!