I need Yellow Pages directory website.

Please see these sites.
magicyellow dot com (magicyellow.com)
addresses dot com
iaf dot net
directory-assistance dot net

I prefer someone or company who has good knowledge of yellow pages, Using Classes/Function ,Ajax , UI interface , search engine friendly, good and clean code in PhP+ Postgres or MYsql. Nice mockup and design. Need to be able to browse directory using sub-directory links and prefer wide use of subdomains in urls.