There are two parts to IdeaTagging.com - the Game and the Blog.
 
The Game

I started Idea Tagging in January 2007, initially as a place for me to post the many business ideas that I have but that I am too busy to pursue. Rather than always disclose these ideas to the public however, I thought I would make a game of it. So I occassionally post clues to a business idea in the form of tags (keywords related to the idea) and invite readers to guess what the idea is. To keep things interesting, I also invite readers to submit their own idea clues so that other readers and I can try to guess what those ideas are. The whole process therefore hopefully serves as an innovation tool, helping to spark new ideas in the minds of readers.

The Blog
 General thoughts on startups and business ideas.