As the amount of data that one interacts with increases, the usability of the interface often decreases. These slides contain design patterns which either maintain their usability as data increases or even improve (ie: recommendation engines).
Think about the standard drop down list companies use for selecting your country when registering for a website. As the number of items in the selection list increases, the amount of time it takes to find an item also increases. While keyboard shortcuts such as typing the first letter exist, for countries like Spain, it takes 18 keystrokes to finally select it. This presentation identifies more efficient patterns that allow users to work with large amounts of data efficiently.