A report in the CITRIS newsletter, CITRIS Newsletter - April 2005, says the report shows that just because digital resources are available it doesn't mean that they will be used in teaching.
Here's a quote:
"But as early analysis of the study data shows, the biggest barriers to instructors using digital resources come from lack of time, equipment, and technical support, not any shortage of great materials. Faculty also said that technology often can’t improve on tried and true teaching methods."