Old Man of Coniston!.
Try 'Flickr'. It is similar to this but people share photos, art and sculpture. They make comments on each others work and share tips for producing, or bettering yourself!. And its spelt Flickr!. Check me out on there, RichiesArt.

miss twilight
www.deviantart.com - display www.etsy.com - sell anything handmade

Tanni M
Heaps,but if it's worth it put a price on it to sell....

artfulmason
Wetcanvas.com..... forums for how to and a retail arm to post your own art for purchase

Stitch
Try, They also have a ton of partner sites, like airbrushartists.org, eroticart.org, tattooartists.org and so on and so on.

redladyart
try:

Hope for the Best
I have my work on Artistrising.com. It's part of art.com. You can set up a 'gallery' of your work and sell them too.