isn't US based. It lists sites from all over the world. If you only want to attract UK customers you just add (UK) to your listing. If you check the list of search engines and portals using the data you will see numerous UK based organisations and sites.
DMOZ data is used by Alta Vista, AOL, Dogpile, Excite UK, Google, Lycos, Netscape amongst hundreds of others.
as PurplePenny has already said, DMOZ is the best. If you get ranked there, then you automatically get ranked onto many mnay others. click here make sure you choose carefully which category you want though.
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