I had a client recently show me a neat little tip that I thought I would share. In the cube he was designing he had the need for measures to show under multiple display folders. For example, he had a Sales Amount measure and he wanted it to be in two display folders for his users: Dollars and Key Metrics. The way this is accomplished is by typing both folder names separated by a semicolon. This images shows a measure that lands under multiple displays folders, but this can be done with dimension attributes as well.
After reprocessing this is what the results look like.
I would imagine that it is pretty rare that you would want to do this, but I thought it was pretty cool that it could be done!