I rather expect that this might be impossible - but I was wonderring if it was possible to post a facebook status via passing in a URL.
Something to the effect of
I found this solution useful also (here)
var facebook_url = 'http://www.facebook.com/sharer.php?'+
'u='+encodeURIComponent('http://google.com/?q=bla')+
'&t='+encodeURIComponent('Some Page Title');
Wow. Almost a full year since I asked this question.
As an FYI and for my own future reference, I did eventually discover how to do this.
http://www.facebook.com/sharer/sharer.php?u=<url to share>&t=<message text>
https://twitter.com/intent/tweet?text=<message>
http://www.linkedin.com/shareArticle?mini=true&url=<url>&title=<title>&summary=<description>&source=<source>
Google plus does not have a good option to use this method in desktop, but you can use their mobile URL
https://m.google.com/app/plus/x/?v=compose&content=<message>
There's a builtin CURL converter in the Graph API that gets you all you need.