Popular keyword research service WordTracker has released the Keyword Questions tool from its WordTracker Labs.
The tool shows questions that people are asking in a specific market (for a specific keyword). Since people often type complete questions into search engines, if you can 1) find them and 2) create content specifically around them, you're in business! With a little brainstorming, you would probably be able to come up with some questions about your products and services on your own, but this may help identify some you have overlooked.
This is definitely one to bookmark for use today and into the future!