An important legal ruling for US academic libraries that provide electronic reserves services is covered in The Chronicle of Higher Education this week (as open content):
By Jennifer Howard
“The judge found violations in only five of 99 instances where publishers said the university went beyond fair use in posting copyrighted materials online.”
Some of the comments (available below the article) are valuable too.
Another update (highly recommended): ARL brief: http://www.arl.org/bm~doc/gsu_issuebrief_15may12.pdf