From what I understand, a lot of the prefered stocks outstanding will not be eligible for the 15% tax treatment. Does anyone know of a way to determine which preferreds are eligible, or if there are any readily accessible lists that highlight eligible preferreds?

I'm not sure this is correct. As long as the amount paid in preferred dividends is not deducted in determining the taxable income of the corporation, it should still qualify for the reduced tax rate. Your best source of information may be the investor relations office of the company whose preferred stock you are interested in.

Ira