Niche Tools

[keywordguy]

Has anyone found or used any tools they consider to be valuable in uncovering or discovering potential niche markets?

I've looked at and researched a couple, but they all use Overture's database to mine keywords. I don't consider Overture's results to be very accurate.

Any success stories in using WordTracker or Google to indentify potential niche markets?

[sbeco]

Here are a couple of niche market themed sites that may give you some ideas:

Product Idea Potential Evaluator software (P.I.P.E.):
http://www.productideaevaluator.com

And the "Nicheology" site:
http://www.nicheology.com