Readability launches paid browser add-on, with subscription fees to support writers
You can set your own monthly fee -- $5 minimum -- and get a browser add-on that lets you dynamically adjust the formatting of articles you read, and save pages to an Instapaper-like reading list. As you read, your donation money gets split up amongst the writers and publishers you enjoy. You can even check your account to see how you contributions are being handed out. Readability is also optimized for several different mobile phones and tablets, so you can catch up with your list on the go.
Of course, for those who'd rather not subscribe, the old Readability tool is still available for free.