I have been tempted to the darkside... i.e. procrastination by Liz Fenwick. She posted about Caroline Smaile's Black Boxes which is a widget that explores the theme for her new novel.
So you click on the black box to the side and it will give you a two boxes, you click on the answer that is more you and it takes you to more boxes. Eventually you end up at the blog of someone who made similar decisions. And that is the theme of the book about how different decisions can thrust you down one road or another. It is something that has always fascinated me, I sometimes look back and think 'what if'... but then I see where I am and it ain't too bad :-)