General Learning Research information that is helpful in designing tools for and specifying best practices in Sakai:
- What Works Clearinghouse
Although closely aligned with the current administration's obsession for controlled, experiemental studies, lots of useful information available here nonetheless.
There is also a follow on volume, much thinner:
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M. Suzanne Donovan, John D. Bransford, and James W. Pellegrino, eds., How People Learn: Bridging Research and Practice (Washington, D.C.: National Academies Press, 1999); online edition available at <http://www.nap.edu/openbook/0309065364/html/
While much of the book is focused on K-12 issues, I found still found it useful for the higher education context.