Here's the presentations from the April 2011 D-STARInfoCon.
D-STARInfoCon Geolocation
D-STARInfoCon Gateway Utilities and Add-Ons
D-STARInfoCon Repeater Operation and Maintenance
D-STARInfoCon D-RATS
D-STARInfoCon 23cm High Speed Data
D-STARInfoCon Operating D-STAR
D-STARInfoCon Getting Started with D-STAR
D-STARInfoCon Programming