I want to do something similar to how facebook reatcs to links...
let's say a user makes a post with a link in it (the post is not 
necessarily just the link)
i want to be able to grab the link from the post, make it clickable, as 
well as a little excerpt from the contents in the page that link is 
anchored to.

eg.

blabla bla blablalbal bla blalba blalba crap! this is a link 
http://domain.com/somepage.html is a cool blog page.

when a user posts the above example, i want to make 
http://domain.com/somepage.html into an actual link which is clickable, as 
well as show some sort of excerpt from the contents in that page... i used 
fb as an example so it's easy to understand what i want to accomplish :)

help?

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