Creating Files in a Full File System (Unix, Linux)

I'm writing a program that has to be very fault tolerant.  I really need to create a file even if the file system is full.  I've always been able to create a zero byte file in this situation, but I never knew you could actually write output to that file (if you stay under a certain threshold)...

http://www.miek.nl/s/09f7401624/

Cool!