I have just created a feed with Instapaperfeed to push the most popular links from my Twitter timeline to my Google Reader account.

That’s a very convenient way to extract interesting news from Twitter.

Here is the how-to:

http://www.readwriteweb.com/archives/instapaperfeed_a_great_way_to_pull_good_reading_ou.php

After following the how-to you only have to subscribe to the rss feed of instapaper with Google Reader. Great!

Update: After a few days I had to determine that no posts appeared in the Google Reader. Therefore I tried a workaround and created a Feedburner feed from the Instapaper RSS feed and suscribed to it. It's a little extra effort but it works fine.