I've gotten started on one
http://www.filesend.net/download.php?f=ed01de02eaa166c8e852318917442c01
It has some quick reference charts, and, a mist calculator. It tells you when your mist will be full based on how much you have now.
I'd like to have it include more things, but I'll need some help, as I'm still new. I'm handy with excel and calculations, so just tell me what it needs and let me worry about the how.
NOTE
I've sent a few of you (good quality posters) a note in the mail if I thought/think you may know things that could help.