MonkeyVision™

This is probably beyond a meme at this point since so many mashups exist out there, however the latest version of this meme refers to software APIs (Application Programming Interfaces) rather and music or video mashups. A good overview of the "new" mashup can be read HERE.

Two good sources to follow the evolution of this meme/tactic are Programmable Web and Google Maps Mania Blog. The former being a complete resource including a database of APIs available to "mash" and the latter focusing on what creative folks and marketeers can do with a single API.