The count is based on the number of files in a directory. Each task is a file, so it's a minimalist approach to managing to-do lists. The task list directory can be changed, as can the
vimcaps (GitHub: suxpert / vimcaps, License: GPL) allows you to remap the caps lock key, in case you don't want to turn it off system-wide. It includes a C program for toggling the behaviour of the key, so the author is looking for help porting it to Mac OS X because he doesn't have a Mac.