Sony, the last manufacturer of floppy disks will quit making them next year. http://arstechnica.com/gadgets/news/2010/04/the-once-ubiquitous-floppy-finally-being-axed-by-sony.ars. I’d say stock up, but I have a box of them that I never use.
My soon took a look at a 3.5 inch and asked why they were called “floppy”, when they come in a hard plastic case. I cracked it open to show the mylar media. I still have some 5 1/4 inch floppies and a drive to read them in the closet. Never had an 8 inch.
If you want to archive your old floppies, I recommend using WinImage. This excellent program “is a fully-fledged disk-imaging suite for easy creation, reading and editing of many image formats and fileystems, including DMF, VHD, FAT, ISO, NTFS and Linux. The disk image is an exact copy of a physical disk (floppy, CD-ROM, hard disk, USB, VHD disk, etc.) or a partition that preserves the original structure.”