You might consult the "Giant Debian Sources.List" > http://sites.google.com/site/mydebiansourceslist/
Well, I did. and the only reference I could find for "lamp" said, "Look in backports.org first!"
Not very encouraging for what I previously thought was generally an exciting, forward-looking, distro. I mean, no encouraging support for folks who might want to experiment with hosting websites??!!
Edit: More bad news. Clicking on the link http://www.dotdeb.org/ leads to a Page Not Found error.