Web Fundamentals for a Newb
arebop: Architectural Styles and
the Design of Network-based Software Architectures (http://www.ics.uci.edu/~fielding/pubs/dissertation/top.htm) is a very readable dissertation on Web architecture. It is the  definitive source on REST. Architecture of the World Wide Web (http://www.w3.org/TR/webarch/) is also worth a visit.