Rosters can be found at
Fresno
http://minorleaguebaseball.com/app/milb/stats/stats.jsp?t=t_ros&cid=259

Connecticut
http://minorleaguebaseball.com/app/milb/stats/stats.jsp?t=t_ros&cid=514

San Jose
http://minorleaguebaseball.com/app/milb/stats/stats.jsp?t=t_ros&cid=476

Augusta
http://minorleaguebaseball.com/app/milb/stats/stats.jsp?t=t_ros&cid=478

A few players of note:

Triple-A: Brian Wilson, Merkin Valdez, Erick Threets, Kevin Frandsen, Dan Ortmeier, Fred Lewis

Double-A: Pat Misch, Billy Sadler, Joe Bateman, Justin Knoedler, Travis Ishikawa, EME, Nate Schierholtz, Clay Timpner

High-A: Nick Pereira, Jesus Reina, Craig Whitaker (listed on SJ Giants Web site, not on milb.com), Marcus Sanders, John Bowker, Brian Horwitz

Low-A: Dan Griffin, Shairon Martis, Pablo Sandoval, Ben Copeland.

Thoughts: I'm annoyed that Copeland is in Augusta, given his age and his performance last year. A clearly inferior player (Dyche) is in San Jose.

Whitaker isn't on the official San Jose roster. Jon Sanchez isn't on the Connecticut roster. I wonder whether they are both in extended spring training or something.