Suzie Boss and I wrote a book but I won't be shilling here! What we've found in the process of writing is that we're part of a larger conversation around the learning functions of digital tools. We're especially interested in project-based learning. Please consider joining the community of interest forming around "reinventing" the learning experience in these different environments:
Reinventing Blog: http://reinventingpbl.blogspot.com
Reinventing Flickr: http://www.flickr.com/groups/reinventingpbl
Reinventing Del.icio.us: http://del.icio.us/jkrauss/reinventingpbl
Image: Flickr Group with 30 members. Please visit and post photos!