According to a recent report, Nokia has ported the Apache web server to Symbian, enabling mobile phones (any S60 2nd Edition Device)  to act as an Internet web server

By way of linuxdevices... "Nokia says it installed its experimental port, initially, on a Nokia 6630, which it then accessed over a Bluetooth PAN (personal area network). This proved somewhat useful, in that it brought "the possibility of accessing functionality on the phone using a big screen and proper keyboard." ... Ultimately, Nokia says it was able to develop a gateway application, released under the open source Apache2 license, said to be capable of providing a webserver on a mobile phone with a URL accessible from any Internet browser. 

Advantages and sample applications enabled by the technology include managing a weblog, instant messaging, and using the phone as a webcam.

Source: (Linuxdevices.com)

Note: This effort is part of Nokia's Racoon Project, a freely downlaodable open source effort available via SourceForge - this Apache port was developed using a Nokia 6630 device.

See also the Nokia Mobile Web Server Project

Nokia mobile web server architechture (Source: Nokia)