Netcraft's latest (January 2002) Web Server survey still has Apache leading among active sites with a 63.69% share, up 0.35%. Microsoft IIS hods a 26.07% share, down 0.55%. Both saw increases numbers of servers. iPlanet was third with 2.99% and Zeus was fourth with 2.16%. Both were essentially unchanged.
Netcraft also reported "mixed fortunes" for Sun's Cobalt subsidiary, which sells Linux-based Web servers. "Although numbers of ip addresses on Cobalt machines has increased over the last year, their share of the total number of sites running on Linux has fallen, almost relentlessly month on month." Netcraft notes that two large customers have switched from Cobalt to conventional Linux machines, Texas ISP Everyone's Internet recently announced "the largest single purchase ever by an independent North American ISP from Cobalt." The company bought seven hundred Cobalt RaQ servers.
Source: Netcraft: <http://www.netcraft.com/survey/>