I was just looking at the optionistics website and came across this article: http://www.optionistics.com/s/stock_dividends. It discusses trading calendar spreads based on the concept that stock price, and therefore option price, is discounted after ex-dividend date. So the short leg of the calendar would be an option that expires before the ex-dividend date, since it's price would not be discounted. The long leg of the calendar would be an option with an expiration subsequent to the ex-dividend date, with a discounted price.
With my limited knowledge, this strategy seemed logical. Just wondered if anyone here had investigated this strategy.