The challenge for art groups is to develop a website that represents the group to the general public, and also provides services to members.
The Boulder Potters' Guild is a good example of striking that balance with their website, BoulderPottersGuild.com.
It also provides gallery pages where member artists can post short bios and photos of their work, and a separate member login area where members can get additional information not available to the general public.
A well-designed and useful art group website such as this is within the resources and abilities of many art groups. It's a major benefit of membership in the group!
For another good example of an art group website, visit the Orchard Valley Ceramic Arts Guild at OVCAG.org. (Disclosure: I am a member of this group.)