I seem to do pretty well with Facebook. I post links to my new stuff not only on my own "wall" but on the walls of some friends who are aware of my wanna-be writer status and who enjoy lookin' at my stuff. (One friend even "shares" my links on a regular basis, which is nice).
I also belong to a number of "Groups" on Facebook that pertain to my Hubs' subject matter (hard rock/metal music) so I post the links there too.
Occasionally if I write about a particular group/band, I'll put the link on their official FB page as well. Queensryche actually thanked me for the support and said I did a "well written" article on them. That was a nice ego stroke. :)