Perhaps the best cited article on the advantages of scripting is John K. Ousterhout's "Scripting: Higher Level Programming for the 21st Century", published in IEEE Computer in March 1998. John, the author of the popular scripting language Tcl (pronounced "tickle"), pretty much lays out the case for scripting languages. The major developments since then have been the creation of new scripting languages with special usefulness for certain domains, and a maturity in the tools that help developers use scripting languages, and test and debug their scripts/programs.
A recent Forrester report "The Forrester Wave: Dynamic Programming Languages, Q3 2007" underlines the case for dynamic languages, focusing on Python, PHP and Perl.
The popular acronym for open source development platform LAMP comprises four elements:
The O'Reilly ONLamp.com site has a great range of materials on the various elements of this platform, and O'Reilly publish the leading books on each topic (e.g. Larry Wall, Tom Christiansen, and Jon Orwant's book Programming Perl (3rd Edition July 2000), known as the Camel Book because of its cover).
This has some interesting videos and some well structured content: nsf.gov - NSF and the Birth of the Internet - Special Report