Ours is - obviously - not the only attempt at bringing together resources on collaborative learning environments. Here are some others:

Collaborative learning specific resources

• Many-to-many is a (collaborative) blog about social software.
• MeatballWiki "deals with online culture, especially how people online come together naturally in groups".
• Part of Jon Udell's blog is all about collaboration.
• Sébastien Paquet writes prolificly about online knowledge communities.
• Open-education.org is a collaborative site that often focusses on issues such as communities of practice and learning communities.
• Also worth checking out is Weblogs in Education and the Educational Blogger Network.
• NoodleTools provides links to a great many conceptual and practical tools for online collaboration in educational settings.
• Stephen Marsh's blog is a growing resource of creative and fun ideas and technologies relating to collaborative work - e.g. on trust and reputation in distributed environments, affective computing and much more.

Resources about e-learning (often but not necessarily collaborative)

• Online Learning Daily, edited by Stephen Downes, often contains material on collaborative learning and learning objects. In addition his very frequently updated edu-RSS lists new postings on other sites related to e-learning.
• The e-Learning Centre is a long running UK portal founded in 1994 by Jane Night with stacks of articles, software reviews and events.
• Brian Lamb is the "Learning Object Discoordinator" at the University of British Columbia and maintains a weblog called Object Learning on "reusable media, weblogs, and lots of fuzzy stuff nearby..."
• D'Arcy Norman's Learning Commons Weblog contains interesting tid-bits on e-learning related topics.
• elearnspace is a portal site developed by George Siemens with many useful articles and other materials grouped under "starting", "enabling", "doing", "evaluating", "managing" and "resources".
• Distance-Educator.com is a large e-learning portal run by San Diego State University. Among other things they have a fair number of links to other e-learning resources.
• elearningpost is a regular on-line newsletter on "Corporate Learning, Community Building, Instructional Design, Knowledge Management, and more"
• Learning Circuits
• elearningeuropa is a portal for e-learning developments in Europe.
• EDNA (Education Network Australia) has a strong focus on e-learning.
• Seul/Edu Educational Application Index lists and describes hundreds of open-source educational software packages.
• The Encyclopedia of Educational Technology (EET) is "a collection of short multimedia articles on a variety of topics related to the fields of instructional design and education and training." There is unfortunately no over-arching structure (articles are alphabetically organised) and articles varies vary in quality, but no doubt there are some gems to be found.
• Theory and Practice of Online Learning (2003) is a free (pdf format) book (but there is an html content page online) on all aspects of online learning. Watch out for chapter 9 though, which presents a restrictive view on intellectual property issues (contrary to most of the sources listed in the copyright and open access section in the book you're currently reading).
• The elearnopedia contains links to all things e-learning.
• The Educational Software Directory lists lots of sites of e-learning software companies.
• cetis (centre for educational technology interoperability standards) "represents UK higher-education and further-education institutions on international learning technology standards initiatives" - sounds boring, but actually contains many useful resources. Also, it provides some good introductions to the issue of standards in e-learning.
• Ray Schroeder's Online Learning Update contains daily links to and short descriptions of online learning related items.

Resources about collaborative work

• Collaborative Work Environments is a very comprehensive listing of groupware, web collaboration software, web collaboration environments and the like.
• Launched in December 2003, Kolabora brings together experts and users of collaboration software.