"Optimist" is a word which here refers to a person who thinks hopeful and pleasant thoughts about nearly everything. For instance, if an optimist had his left arm chewed off by an alligator, he might say, in a hopeful and pleasant voice, "Well, this isn't too bad. I don't have my left arm anymore, but at least nobody will ever ask me whether I am right-handed or left-handed," but most of us would say something more along the lines of "Aaaaah! My arm! My arm!"
theboardoptimistic at gmail.com is a good way to reach Optimistic. He likes to get emails. No foolin'.
He also keeps a blog. You should read it. Really.