Here's a good site....

...to post you art.
www.ledheavy.com
There's alot of pro and amatuer artists that will comment and critique your work. It's a great place to go if you wanna improve your art or, just show it off. It's set up like a forum and is pretty casual.

This is a good site too.
www.deviantart.com
Lots of stuff here too.

How many words do you need to reply, not to get the message saying your reply is to short??
Just wanted to say, nice find, NTH!