While offending Christians is welcome in this day and age, the marked Latin and Greek history of the word, originating as "daímōn" with an 'a', and the fact that 'æ' exists, both make "dæmon" a cool enough spelling that I'm keeping it, and the fancier spelling helps keeping safe and separate from the christofascist corruption of the word for when I am more in mind of the mechanics and purposes rather than having to be a soldier in someone else's cultural war.