Kingsville Texas is the county seat of Kleberg County; in January of 1997 county commissioners unanimously designated "heaven-o" as the county's official greeting.
Okay, I know that's not really breaking news; but I've been on a bit of a separation of church and state kick, so when I stumbled on this I thought I'd share.
So what is wrong with using "hello?" Well it turns out that Leonso Canales Jr. thinks "hello" is a negative greeting due to its association with "hell." What?!
According to Canales "The 'O' is not enough to hide the most negative word (hell) printed in every dictionary" and speaking the word is even worse. So in 1988 Canales (with assisted insight from his brother) coined the greeting "heaven-o."
There is no etymological link at all between the words "hell" and "hello", the latter deriving from older forms such as "hallow" and "hullo". Ironically, this common greeting probably has its oldest origins in the Germanic word "hailæn" (or Old English "hælan), which means to heal, to cure or to save, either in the physical or religious sense.
What's worse is that this shining example of ignorance somehow managed to convince the Kleberg County commissioners of the link between "hello" and "hell." And subsequently persuaded them "heaven-o" was better. Then with a direct violation of the first amendment the county designated "heaven-o" as their official greeting; instructing chamber of commerce and courthouse employees to answer the phone "Heaven-o."
As far as I can find, this policy still stands.
If you're feeling adventurous, he has a webpage