Download and install the extension from Google Chrome Extensions.
Scraper is pretty easy to use if you know some basic XPath syntax (and jQuery selectors). Even if you don't, you can probably scrape by.
Until I have time to write more comprehensive documentation, you can follow these steps to get started:
Of course, once your data is in a spreadsheet, you can do wonderful things with your data such as plugging it into Google Refine.
Some of the icons used in this extension are from the generous Yusuke Kamiyamane.
Beneath the hood, jQuery is used pretty extensively pretty much everywhere.
This extension was crafted with care by Dave Heaton (dave@bit155.com). You can follow his Tumblr blog or find him on Twitter.
Developers can download this project in either zip or tar formats.
You can also clone the project with Git by running:
$ git clone git://github.com/mnmldave/scraper