You can now access to the ALA Midwinter Linked Data Recordings of the sessions Linked Data for Holdings and Cataloging by Eric Miller (Zepheira) and Richard Wallis (OCLC). 

• Linked Data for Holdings and Cataloging: The First Step Is Always the Hardest! (Audio and Slides)
• Linked Data for Holdings and Cataloging: Interactive Session (Audio)

More information at http://eventscribe.com/2013/ALA-Midwinter/aaSearchByDay.asp