Apache Rules
According to The Register posting Apache rules web server landscape.
Apache is still top of the web server charts with just under half of the top 100 US websites running on the open source software.
Here are the results from Netcraft.
(Credit: Netcraft)

Growth is up again this month, with the February 2008 survey receiving responses from 158,209,426 sites. This is an increase of 2.6 million sites, compared with last month’s unusually low growth of only 354 thousand.
Apache continues to climb back, now reaching nearly 51% of the market share, while both Microsoft and Google fall slightly in share.
Some strong growth is seen amongst the smaller web servers. LiteSpeed grows by a further 10% this month, now approaching half a million sites with a total of 476 thousand hostnames. The LiteSpeed web server is interchangeable with Apache and is used by the Wordpress blogging system. LiteSpeed was the fastest and most robust server that Wordpress had tested, according to its founding developer, Matthew Mullenweg.
Unusually, America Online’s open source AOLserver sees tremendous growth, jumping from 35 thousand to 105 thousand sites in just one month. AOLserver is a multithreaded, Tcl-enabled web server which can be used for large scale, dynamic web sites, but has not seen the release of a new version since 2006. The majority of the new sites served by AOLserver are hosted in Poland.
I’m surprised AOLserver is hanging in there, especially since AOL has been in deep yogurt for sometime.
…John