Stonley: AOD was a tax advantage fund meaning that a large percentage of its dividends were qualified. But since the tax cuts are due to expire, Alpine Woods management is not managing the portfolio to produce tax advantage income. If you want information just open any press announcement and find a link to the Alpine web site.
There are a lot of good municipal CEFs. VGM, VMO, MAV, PMX, BKN and EVN are some of the higher yielding funds.