Over at Farmstros they have a list of the players who are eligible for the Rule 5 Draft in December.
Players in all caps are eligible for the 1st time. If the player is on the 40-man roster, they may be eligible, but I've taken them off the list.
WANDER ALVINO, RHP (Tri-City in 2009)
Brandon Barnes, OF (Lexington/Lancaster/Corpus Christi)
Chris Blazek, LHP (Disabled)
RICARDO BONFANTE, IF (Lexington)
Steve Brown, OF (Lexington/Lancaster)
LEANDRO CESPEDES, RHP (Lancaster)
KOBY CLEMENS, IF/OF (Lancaster/Corpus Christi)
DAYAN DIAZ, RHP (Disabled)
Jose Duran, RHP (Lancaster)
Mitch Einertson, OF (Corpus Christi)
Evan Englebrook, RHP (Corpus Christi)
Oscar Figueroa, IF (Tri-City)
Josh Flores, OF (Disabled)
Pedro Gonzalez, C (Lexington)
BRYAN HALLBERG, RHP (Lancaster)
CASEY HUDSPETH, RHP (Lancaster/Corpus Christi)
ARCENIO LEON, RHP (Lexington)
Drew Locke, OF (Corpus Christi)
Tyler Lumsden, LHP (Corpus Christ/Round Rock)
DAVID MARTINEZ, RHP (Greeneville)
JHONNY MEDRANO, IF (Tri-City)
NICK MORESI, OF (Lancaster/Corpus Christi)
MATT NEVAREZ, RHP (Lexington)
ANTONIO NOGUERA, LHP (Tri-City)
Mark Ori, IF (Corpus Christi)
SERGIO PEREZ, RHP (Corpus Christi)
Reinaldo Pestana, C (Lexington)
RAFAEL PIO, RHP (GCL Astros)
EBERT ROSARIO, IF (Lexington/Lancaster)
CHRIS SALAMIDA, LHP (Lancaster)
Renzo Tello, OF (Tri-City)
JIMMY VAN OSTRAND, 1B/OF (Corpus Christi)
HENRY VILLAR, RHP (Lexington)