I just stumbled across this list of "humorous mystery authors" that I pulled from the DorothyL list. I've only read a couple of them, so I can't say if they are good, bad, fluffy or anything else.
Andrews, Donna
Apodaca, Jennifer
Avocato, Lori
Berenson, Laurien
Byerrum, Ellen
Chittenden, Meg
Churchill, Jill
Cohen, Nancy J.
Colley, Barbara
Daheim, Mary
Davidson, Diane Mott
Dietz, Denise
Durham, Laura
Farmer, Jerrilyn
Fitzwater, Judy
Fluke, Joanne
Francis, Dorothy
Grilley, Kate
Harris, Charlaine
Holliday, Alesia
Hunter, Maddy
Hyzy, Julie
Isenberg ,Jane
Kelner, Toni
Kozak, Harley Jane
Marshall, Evan
Martin, Nancy
McBride, Susan
McCoy, Judi
Meier, Leslie
Sholes, Joe Moore/Lynn
Myers, Tamar
Myers, Tim
Pollero, Rhonda
Pence, Joanne
Rosett, Sara
Scott, Michele
Sharp, Deborah
Short, Sharon
Star, April
Strohmeyer, Sarah
Swanson, Denise
Viets, Elaine