2011-11-25 UTC
# 
tantek the closest we've gotten to that in the past is trackbacks/pingbacks, but even there, I don't know of any blogging systems which would treat their comment box as a *post* authoring box for your own blog (e.g. via the Metaweblog API), but that's certainly worthy of an experiment (plugin? perhaps there already is a WordPress plugin to do so but I don't know of any)