Not worth it anymore. All the great ones are already taken.
I have one that gets descent search engine traffic because it has keywords in it.
http://www.hardcore-sex-erotica.com
Go to registrars.com to get names up to 64 or something characters long. Plus it's way easier to modify than internic. (network solutions.)
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<A HREF="http://www.lushsex.com" TARGET=_blank>http://www.lushsex.com
</A>Everybody Get Your Mother Fu*#ing Lush on!