This is one of the funniest...and most enjoyable...posts I've read. Got a couple of more for you...how about;
to, too, and two
and
do, due, and dew
I'm not an English teacher, but I did have excellent instructors, and I always have been a good speller. As a result, it drives me bonkers to see misspelled words and overdone quotation marks. Okay...done griping...but I keep saying I'm coming back as an English teacher in my next life!