This excerpt taken from the AN DEF 14A filed Mar 27, 2008.
Restricted Stock Units
A grantee will not have taxable income upon grant of restricted stock units. Instead, the grantee will recognize ordinary income equal to (i) the amount of cash paid and/or (ii) the fair market value of the shares of common stock or other property on their respective payment dates when such cash, shares of common stock, and/or other property are delivered or paid to the grantee in accordance with the terms of the restricted stock unit award. The grantee will also recognize ordinary income to the extent he or she receives current payments of dividend equivalents in respect of his or her restricted stock unit award. In general, the Company will receive an income tax deduction at the same time and in the same amount as the grantee recognizes ordinary income.