Searching for a new visual metaphor

Preparing for an upcoming class I was prowling aournd the web looking for stuff on Knowledge Brokers. I cound an article and downloaded a copy.

And what is Adobe's icon to save a copy? A tiny rendering of a 3.5" diskette. While I make the connection, I'm sure that there are many people who have no idea what a diskette is.

Will this icon transcend the technology behind it? We've seen that with all telephones being represented by a handset that was originally manufactured in 1949 and was based on an older design from 1937.

Photo Source:http://en.wikipedia.org/wiki/File:Model500Telephone1951.jpg

The problem is that some time very soon the diskette visual metaphor will mean nothing to the vast majority of people.