In my job as an Information Architect, I do a lot of web interface prototyping of different kinds of web UIs. Something occurred to me for the first time only while trying to create a nice ‘save’ button for a web form… all the save icons in the world are still images of 3.5″ floppy drives.
Thanks to Google, I know that I’m not the only one who has wondered about this (though perhaps I was the only one doing it at 2am EST when I should’ve been finishing my ‘end of day’ deliverable). See:
Personally, I use Mark James’ excellent set of Silk icons for my prototypes. Interestingly, his graphic 
is called “disk.png” not “save.png”. He just draws the pictures, we create the relationship.
I still have a floppy drive in my computer, but the last time I tried to view a disk of my university essays, the media had degraded to a point where all it did was error out. What will us in the future?