Google unleashed a new service called Google Trends yesterday. This makes it very easy to compare what people are searching for on the Internet. If that doesn't excite you and get the creative juices, I think you are beyond my help. Seriously, there's got be about 100 ways to monetize this. I spent some time doing searches for local cities to see if there's a correlation to real estate prices. Whatever that is, I feel like Google Sets should play a role in making sure you have all the relevant data.
If anyone has any other ideas (besides the obvious stock market searches), please drop me a comment.
Next: Rich Dad, Poor Dad revisited