I also wrote sscanf but haven't gotten a chance to use it yet. My stupid state machine based input code works well enough, so I haven't bothered to change the code to use sscanf yet.
It compiles, and it works when I test it on my linux box. Only has %c, %u, and %d at the moment, but it should be pretty easy for someone to add other stuff to it.
http://meatmanek.net/scanf.c