if you haven't checked it out yet, then take a look at fictionaut - a new forum for adventurous readers and writers that allows to post ones work, and comes with comment- and message options. all this, rather well done.
for some more background on fictionaut, here an article about the place: Transcend and Include: Fictionaut and the Future of the Literary Magazine.
one of the features of fictionaut allows to create subgroups. the idea of those groups: Fictionaut groups allow members to add previously published stories to the groups of journals they originally appeared in – thereby getting more exposure for their writing and, in turn, leading a new audience to discover magazines they might not have heard of otherwise.
to be part of the story exchange, i now registered a "BluePrintReview" group there -- here the direct link: fictionaut group - BluePrintReview.