So cool! I would really love if there was an OSX version
http://www.peachpit.com/blogs/blog.aspx?uk=Mac-Productivity-...
I'd recommend changing it to "Get URLs of images linked from these webpages" though, to get the high-res version.
Err, I don't know what's polite in terms of editing the readme and stuff. I hope what I did is acceptable.
It only sets it for the space I'm on when I run the script. I have no idea what will happen with crontab. But, you can also just use this to populate the folder, and have osx change the photo every hour or so from the menu.
I also removed the re-sizing. If you want to install the python imaging library, `brew install pil` works. Then just uncomment the function.