Thanks Tank, they had a few search engines I hadn't heard of.
Winterchase, I'd be careful with the whole DMOZ thing. From what I read, it doesn't appear to have any affect on any other search engines. DMOZ is itself is "The Open Directory Project is the largest, most comprehensive human-edited directory of the Web. It is constructed and maintained by a vast, global community of volunteer editors."
I'm sure the editor you came across is not the norm, and as with all web programs, a select few will try and take advantage of it