The AOS Forum
A good site to get answers to your questions from a diverse group of knowledgeable growers. Note, this group grows a large array of different orchids.
Orchid Safari has a live chat on different topics with guest speakers. The live meetings are 8:00 p.m. (Central) , that's OrchidSafari time on Wednesday and Saturday nights. This site also contains the archives from previous discussions.
Garden Web Orchid Forum