interesting, thanks pred. i could never figure out how to get them to return results w/ hyphenated names because even when i check the box to include hyphens it never does :?:
also, in my research i have found that almost all good generic-words.com that make sense are taken. for less commercial words you might find, for example, sun-shine.com taken but shine-sun available. but for more commercial domains you would find, for example, both used-cars.com and cars-used.com will be taken.
in many cases for strong keywords the underscore names are also taken, as in keyword_keyword.com