Van de Sompel is an enthusiastic talker and really does his best to take the audience in the world of scientometrics. I am a fan. Have a look at the subjects of this blog. The Mesur project is about a totally new set of data analysis of scholarly communication moving partly away citation data to actual downloading and clicking behaviour and perhaps reading habits. Their goal is to develop new metrics.
Really interesting stuff. But still really a little bit beyond most libraries.
Bollen, J., H. van de Sompel, et al. (2008). Towards Usage-based Impact Metrics. Proceedings of the 8th ACM/IEEE-CS joint conference on Digital libraries: 231-240. http://portal.acm.org/citation.cfm?id=1378889.1378928