If I could have just one feature added to Chrome it would be a combined clip and bookmark:

With one click I could copy both the highlighted items and bookmark info which I could then paste in a Google document with a favicon (URL attached) bookmark title, followed by all the highlighted items.

This would be better than Google Notes (on its way out), Ubernote, Evernote etc...

It would fit in beatifully with Google's recent attempts to make Google documents more student friendly: such as adding footnotes.

Is there a Javascript that would get me part way there?

I hope that someone will come up with a plug in.

Hey dlg, i'd like to work on that using Javascript, could you be a little more specific as to what you expect the "plugin" to do ?

Give me some use cases and i'll see if i can help.