"I liked the new blog btw. The Judy Blume-ish feel to it brought me way back. I was shocked that you used so public a forum to admit I was right about "isoteric." Now you can use that same forum with the answer to your question: the antonym of esoteric is...
exoteric, adj. Not confined to an inner circle of disciples or initiates. Comprehensible to or suited to the public; popular. Of or relating to the outside; external
External; public; suitable to be imparted to the public; hence, capable of being readily or fully comprehended; -- opposed to esoteric, or secret.
suitable for the general public; "writings of an exoteric nature" [ant: esoteric]
Dere ya have it, straight from the mouths of the American Heritage Dictionary, Webster's Revised Unabridged Dictionary, and Princeton's WordNet."