Yes, it's a multisite sub-directory install with the main site being BP and the rest being individual blogs.
What I'm looking for is the same function as when you have a facebook page for example and can Share and Like things back to your own page but in this case, their home page on my WP site.
Other examples include any other social sharing functions back to Digg, and Reddit and other such sites.
What you've given me in terms of Press This is good for blog owners, I'm looking for a way for basic users on the site to be able to Share and Like (or what ever we'll call it) back to our site.
I am quite sure this means programming a full out API or something but I need to gather up information so I can figure out what will be needed.
BTW, I've been trying to use that Press This function but it's only capturing text/links but if I try to insert images, it just sits there doing nothing.
I've tried both latest ie and latest firefox and had another person try it also and images didn't work for them also. Looking at docs on the net, we appear to be doing it as we are supposed to.