I recall 3m made removable floppy labels at one point, using post-it glue. That might work. I don't think removing a detached label in a portable would be too brutal, but I worry about residue scraping off onto something sensitive.
Here is one place selling avery removables that may work. I haven't tested them. They are listed as removable and repositionable. http://www.compuforms.com/remove.htm ----------------------------------------------------------------- To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED]