links for 2007-01-08 9 enero, 2007 by Ruben Colomer | 0 comments IPligence Geolocation Services, IP address location of visitors Base de datos gratuita (tags: ip geolocation tools) Philipp Lenssen: The Basics of Search Engine Optimization (tags: SEO tips) 100 Most Influential Books Ever Written (Seymour-Smith) (tags: books list)