This is really nice. So far, the only thing I would add is the ability to differieniate between 'read' and 'unread' items in Pinboard. I use that feature a lot to 'read' later items that are not Instapaper-type reading, but more, "I should download this thing and try it out, etc." For example, your scripts and snippets fall into this category. Thanks for providing this - if I happen to add in CSS selectors for read/unread I'll pass it upstream to you.
Remarkbox