So what exactly is an “open letter”? I’ve been curious about this for a while and after having read Alan Davis’ letter on Mircleman over at Newsarama so I decided to do an extensive web search for a defination, but handy AOL Keyword “Dic” gave me

open letter
t noun a letter addressed to a particular person or group of people but intended for publication in a newspaper or journal.

so now I know…..