This was the main service I've used for the past 2+ years to deliver individual articles to my Kindle. It worked great and I would've paid good money to keep it

This was the main service I've used for the past 2+ years to deliver individual articles to my Kindle. It worked great and I would've paid good money to keep it. Instapaper has a similar feature, however it was never quite as good as Readability's. What are you using to send & read web articles on your Kindle?