Here is a great list of real URL's where the registrar clearly didn't think about the words put together!
1) Who Represents?, a database for agencies to the rich and famous: http://www.whorepresents.com
2) Experts Exchange, a knowledge base where programmers can exchange advice and views: http://www.expertsexchange.com
3) Looking for a pen? Look no further than Pen Island: http://www.penisland.net
4) Need a therapist? http://www.therapistfinder.com
5) Mole Station Native Nursery, based in New South Wales: http://www.molestationnursery.com
6) Gas central heating anyone? http://www.gasheating.co.uk
7) New to Milan and you need electric light? Why not sign up on-line with Power-Gen? http://www.powergenitalia.com