This excerpt taken from the GOOG 8-K filed Aug 28, 2007.
Departure of Certain Officers
On August 27, 2007 George Reyes informed Google of his intention to retire as Chief Financial Officer. The effective date of his retirement has not yet been determined. George indicated that he will remain to assist in the search for a new CFO and to assure an orderly transition, which Google expects will occur by the end of the year.
This Form 8-K incorporates by reference the press release announcing Georges retirement, filed as Exhibit 99.1 hereto.