From the press release:

The New York Yankees announced today that 15 first-time Old-Timers will attend the 62nd annual Old-Timers' Day at Yankee Stadium on Saturday, Aug. 2. This season marks the final time that Old-Timers' Day festivities will take place at the current Yankee Stadium, as the club will move into a new Yankee Stadium across 161st Street in 2009.
Introductions are scheduled to begin at 1:45 p.m. with the traditional Old-Timers game to follow. The Yankees will then host the Los Angeles Angels of Anaheim at 3:55 p.m.

Among the newcomers are seven members of the 1996 World Championship club, including Yankees Special Assistant to the General Manager Tino Martinez, Pat Kelly, Jimmy Key, Graeme Lloyd, Ramiro Mendoza, Jeff Nelson and Tim Raines. Baseball's all-time stolen base leader Rickey Henderson will also make his first Old-Timers' Day appearance at Yankee Stadium, along with current pitching coach Dave Eiland, former manager Buck Showalter and former coach Jeff Torborg. The first-timers are rounded out by Don Baylor, Tony Fernandez, Wayne Tolleson and current YES Network broadcaster Al Leiter.

Joining the rookie Old-Timers on the baselines will be over 50 additional former Yankees, including at least one player from each of the last 16 Yankees World Championship teams since 1947. This year's ceremonies will mark the largest number of Yankees alumni in uniform for Old-Timers' Day in the history of the event.

Partial list of those scheduled to attend:
(*Denotes first-time Old-Timer)

Jim Abbott
Luis Arroyo
Steve Balboni
Jesse Barfield
*Don Baylor
Paul Blair
Johnny Blanchard
Ron Blomberg
Wade Boggs
Scott Bradley
Dr. Bobby Brown
Homer Bush
Andy Carey
Chris Chambliss
Horace Clarke
Jerry Coleman
David Cone
Ron Davis
Bucky Dent
Al Downing
Brian Doyle
*Dave Eiland
*Tony Fernandez
Ed Figueroa
Oscar Gamble
Joe Girardi
Eli Grba
Ken Griffey, Sr.
Ron Guidry
*Rickey Henderson
Tommy John
*Pat Kelly
*Jimmy Key
Gene "Mickey" Klutts
Johnny Kucks
Don Larsen
*Al Leiter
*Graeme Lloyd
Hector Lopez
Kevin Maas
*Tino Martinez
Bobby Meacham
*Ramiro Mendoza
Gene Michael
Rich Monteleone
*Jeff Nelson
Graig Nettles
Gil Patterson
Joe Pepitone
*Tim Raines
Bobby Richardson
Mickey Rivers
*Buck Showalter
Charlie Silvera
Bill "Moose" Skowron
Luis Sojo
Darryl Strawberry
*Wayne Tolleson
*Jeff Torborg
Mike Torrez
Tom Tresh
Bob Turley

Via Steve.