L.A.M.P. refers to a toolset consisting of Linux + Apache + MySQL + PHP|Perl|Python|Postgresql... providing a powerful framework for rapid development of robust solutions. Each component is open source and has proven to be enterprise ready.
You may have noticed the drupal related pages appearing on the site.
Drupal is a big part of the enterprise software stack around which LAMPgroup has formed. So, explorations leading to documentation are put into the public realm from the earliest drafts. Feel free to add your input, testing, criticism etc.