General Articles
Andrews, Mark. "OPAC Changing Markets, Changing relationships: How Libraries and Vendors Respond to the "Next Generation" Challenge." Library Hi Tech. vol.25, no.4, 2007. p. 562-578.
Documents the problems with current ILS and advises vendors and librarians as what features to ask for in the Next Generation of OPACs.

Mercun, Tanja and Žumer, Maja. "New Generation of Catalogues for the New Generation of Users: A Comparison of Six Library Catalogues." Program Electronic Library and Information Systems. Vol. 42, No. 3, 2008. p. 243-261.
Describes some of the problems and issues faced by online library catalogs, and compares Amazon to the way new catalogs are being designed.

Singer, Ross. "In Search of a Really "Next Generation" Catalog." Journal of Electronic Resources Librarianship. Vol. 20, 2008. p. 139-142.
Describes the new features such as facets being offered by the next generation interface.

Articles on Specific Systems

"AquaBrowser." Library Technology Reports. Vol. 43 No. 4. July-,August 2007, p. 15-19.
Describes the use of Aquabrowser by Queens Borough Public library.

Marcin, Susan and Morris, Peter. "OPAC: The Next Gneration: Placing an Encore Front End Onto a SirsiDynix ILS." Computers in Libraries. Vol. 28, no. 5. May 2008. p. 6-12.
Fairfield University's experience with Encore.

"Encore: Innovative Interfaces Inc.'s library Catalog." Library Technology Reports. Vol. 43, No. 4. July-August 2007. p.23-28.
Antoher look at III's Encore.

Antelman, Kristin; Lynema, Emily and Pace, Andrew K. "Toward a Twenty-first Century Library Catalog." Information Technology and Libraries. Vol. 25 No. 3, September 2006: p. 128-140.
Describes North Carolina State University's move to add Endeca's Information Access Platform as a front end to their ILS.

Beccaria, Mike and Scott, Dan. "Fac-Back-OPAC: An Open Source Interface to Your Library System: If you Look Under the Hood, Fac-Back-OPAC Demonstrates What's Possible with the Next Generation of OPAC Software." Computers in Libraries. Vol. 27, No. 9, October 2007. p. 6-12.
Using an open source product to modernize a catalog interface.

"Next-Generation Flavor in Integrated Online Catalogs: Polaris Library System's Polaris." Library Technology Reports. Vol. 43, No.4. July-August 2007. p. 38-42.
Compares Polaris, Evergreen and Koha, three open source products.

"Why WorldCat Local? "Web Scale" Discovery and Delivery of Library Reousrces: University of Washington Libraries and OCLC's WorldCat Local." Library Technology Reports. Vol. 44, No. 6. August-September 2008. p. 7-17.

"Planning and Implementation: University of Washington Libraries and OCLC's WorldCat Local." Library Technolgy Reports. Vol. 44, No. 6. August-September 2008. p.
26-37.

"WorldCat Local: Online Computer Library Center." Library Technology Reports. Vol. 43, No. 4. July-August 2007. p. 33-38.

LISTSERV discussing Next Generation catalog issues: NGC4LIB:
http://dewey.library.nd.edu/mailing-lists/ngc4lib/