T-shirt blogs and contests

Indie Threads
T-shirt forum
Tcritic
Selekkt
Hide Your Arms
TEEES
Addic[tee]d
I love your t-shirt:
FunkyDuds
T-Roundup
T-shirt alert
T addict
Emptees
Dog In The House
T-shirt Island
Design By Humans

T-shirt sites

Indie Shopper
All Favourites
Modcloth
buy-tees.net
Design By Humans
Defunker
Stars & Infinite Darkness
Little Paper Planes
Loops & Pluto
Huebucket
Ames Bros
Seibei
Kindred
MNKR
Pyknic
Shirt.Woot

Tradeshow stuff

Indie Craft Shows
Indie Craft Fair Guide
Renegade Craft
Charm City Craft Mafia
POOL
Red Prairie Press