http://www.nbc.com/30_Rock/
Main Characters
Tina Fey as Liz Lemon... http://www.fanmail.biz/39001.html
Alec Baldwin as Jack Donaghy... http://www.fanmail.biz/1131.html
Tracy Morgan as Tracy Jordan... http://www.fanmail.biz/2938.html
Jane Krakowski as Jenna Maroney... http://www.fanmail.biz/46312.html
Jack McBrayer as Kenneth Parcell... http://www.fanmail.biz/104867.html
Scott Adsit as Pete Hornberger... http://www.fanmail.biz/12857.html
Judah Friedlander as Frank Rossitano... http://www.fanmail.biz/3393.html
Keith Powell - Toofer... Not in database
Lonny Ross - Josh Girard... http://www.fanmail.biz/105759.html
Katrina Bowden - Cerie... http://www.fanmail.biz/105694.html
Minor Characters
Maulik Pancholy - Jonathan... http://www.fanmail.biz/96898.html
Rachel Dratch - Misc. characters... http://www.fanmail.biz/30481.html
Chris Parnell - Dr. Leo Spaceman... http://www.fanmail.biz/1121.html
To write to the people who are not in the database, try this via venue address:
30 Rock
Silvercup Studios
42-22 22nd Street
Long Island City, NY 11101