This excerpt taken from the KEYN DEF 14A filed Jan 28, 2005.
Revocability of Proxies
Any person signing a proxy in the form accompanying this proxy statement has the power to revoke it prior to the Annual Meeting or at the Annual Meeting prior to the vote. A proxy may be revoked by any of the following methods:
Please note, however, that if a stockholders shares are held of record by a broker, bank or other nominee and that stockholder wishes to vote at the Annual Meeting, the stockholder must bring to the Annual Meeting a letter from the broker, bank or other nominee confirming the stockholders beneficial ownership of the shares.