Directory/Cityguide clone of Tripadvisor, Yellowpages, Yelp, ...

Hi I'm looking for a directory/cityguide clone of websites like yelp, tripadvisor, yellopages, ... It's mainly a king of local businesses. Taking the best of all those websites with organic/natural optimization (SEO) characteristics. Lists of architectural needs : - a home page, a search engine (what ? where ?), results listq, categories list of shops, card shops - use of templating system (separate the code and the design) - having modules like nested business, shops, restaurants, florists, (and so on..), nested in category or nested in distance - accounts management, to allow people post comments and vote - different languages (English & French, have to preview a language file) - on a basis of a CMS/CMF, an existing script, or specific development The business card shops : - business informations, location - opening schedule - websites - pictures, icons of business - google maps - voting/commenting module in Ajax Needs of SEO - URL rewriting - no duplicate content (1 result is 1 URL only) - optimization of the content (Tags H1, H2, ..., STRONG, automatic METAs/Title, Title on links, Alt on images) - complete internal organic/natural optimization (netlinking, nested business by category, nearest business) - I insist on a good netlinking integration. Interface needs : - web 2.0 looking - pretty template, airy, modern To give you an idea of the outcome, I give you examples of sites competing for "florist": - [login to view URL],%20DC/[login to view URL] - [login to view URL] Optionnal needs : - providing of business by category (optional with latitude/longitude, pictures, schedule,...) - external SEO prestation - Beeing able to manage domain/subdomain (example : [login to view URL] or [login to view URL])... probably with URL rewriting - each category may be display a mini-portal (external RSS integration, latest/popular listings or comments,...) Thank you for your proposals, i would like you to give examples of your previous projects relevant to my needs (directory and/or SEO).