Anyone looking for an expansive forum dealing with networking, art industry, art market, arteducation, art events, art competitions, employment opportunities, peer critique, regional and international forums plus a listing of extensive links check out www.artforum.com.au
Note that I have not checked the above site out thoroughly, don't go expecting to do the meet and greet with artists at the top of the tree, but; trawling the postings produces some interesting insights.
Good opportunities for allowing students to peer review work and gain access to feedback from a broader art community could be accessed through www.redbubble.com
On a more serious note the Association for Temporary Art offers access to art dealing with contemporary issues (check out their archive) and online seminars. Find this at www.temporaryart.org
Loking to find what's on the galleries, visit www.artwhatson.com.au