I’ve had a shuffle since they first came out, I’ve never once used it as a memory stick. The reason is because you have to bifurcate the storage space into music and data sections. Since the music section is only 1 GB to start with and my music collection is 20+GB I always felt like it would be a waste of space.
Especially since good, much, much larger USB flash drives are available, cheaper.
My $0.02. (Is there a British equivalent to that phrase?)