Flawed Ziff Davis eWeek 2.6 kernel article
http://www.eweek.com/article2/0,3959,652846,00.asp
My favorite part:
=====
In addition, Linux is still too dependent on local user lists. Universal LDAP support and systemwide LDAP integration, not scheduled for 2.6, need to be built in. On the server, this isn't a big deal, but deploying desktops without comprehensive support for a global user directory can be a nightmare.
=====