Reading List to Instapaper on GitHub 

The Reading List to Instapaper sync tool that I built and mentioned about a week ago is up on GitHub.

I haven't had a ton of time to document it, but it's up live and you can clone it and get it running on your own machine.

It's been working for me for over a week now and I haven't run into any issues. I'm happy to answer any questions (or fix bugs) should they crop up.