Quick, before Google's lawyers start serving cease and desist notices: check out Booble, a new "adult search engine" (it's a listings site, actually) which catalogues over 6,000 adult sites by hand - though as Boing Boing points out, any adult search engine which turns up zero results for bukkake (or "Fleshbot," for that matter) has a ways to go before it becomes a truly useful resource.

Booble: The Adult Search Engine
"Booble takes a poke at Google" (Sydney Morning Herald)
"Booble me, baby" (press release)
See also: Googirl

Update 1/29/04: Booble.com publishes Google's notice of copyright infringement here (thanks Paul and James - see also threads at Metafilter and Slashdot)