Most algorithms on search engines weigh double or triple hyphened domains almost exactly the same as single hyphened domains.
Hyphened domains suck for type-ins but for SEO every keyword combination is still available. Just keep adding hyphen's.
Example:
tech--jobs.com
song--lyrics.com
april--fools.com
people---finder.com
prom---dresses.com
used---cars.com
free---clip--art.com
ask---jeeves.com