I have recently joined Evostock, a virtual agency on Photoshelter where photographers can come together to present their combined work to art buyers. From Evostock's homepage:
Evostock is a online community of highly creative professional photographers coming together with their imagery to provide clients one place to search across a large collection of the highest quality images from a wide spectrum of photographers and perspectives.
Evostock is committed to providing fresh, new, and evolved images for this evolving world we live and work in.
I invite other stock photographers on Photoshelter to join Evostock by contacting Tim McGuire at the email address listed on the Evostock homepage.
