I spent hours coding a script nearly identical to this, only to discover it was already created when searching for a solution to my "/reader/link-frame" error.

I wish I had found it earlier but this is perfect and exactly what I wanted.

My only complaint is that it needs to be keyworded on this site a little better so others can find it quickly.

The AddTo Google Reader script adds web pages to your shared items in Google Reader, so you can bookmark and share non-feed items easily.