Many of us keep blogs and have twitter accounts, and I know that many of us post up our best work there. Personally I love seeing people's work on their blogs, and I follow the latest work of many mailartists on Twitter too, where the banter is really good.
If you have a blog and/or a Twitter that deals with mailart list it here!
My blog is http://myrealwall.blogspot.com
and my Twitter account is @andytgeezer