Depends on who you ask according to the research and comments...
http://www.switched.com/2007/09/04/m...eller-500-000/

One of the many Free ebay misspelling tools...

For buying and Reselling... eBay mistake's...
http://www.gumshoo.com/
http://www.gumshoo.com/Help/00faq_html

Thanks Bill,
There's some interesting ideas & stuff in... http://www.gizmag.com/

Phil