Exhibit A

Mr. Brown also directly owns employee stock options to purchase shares of
Class A Common Stock as follows:

Option to purchase 50,000 shares with (i) exercise price of $20.69 per share,
(ii) vesting in five equal annual installments beginning on 02/08/2004 and
(iii) expiration on 02/08/2013

Option to purchase 12,500 shares with (i) exercise price of $24.80 per share,
(ii) vesting in two equal annual installments beginning on 04/18/2004 and
(iii) expiration on 04/18/2011

Option to purchase 50,000 shares with (i) exercise price of $210.00 per
share, (ii) vesting in five equal annual installments beginning on 02/14/2001
and (iii) expiration on 08/21/2010.