Came across another T-Shirt design space similar to Threadless and Designbyhumans - except this one made by an Australian crew, i do believe. 
Here’s what they said about themselves :

Wooshka is a continuous t-shirt design comp where you, the Wooshka community, get to submit design ideas, help decide which designs go to print as well voting on many other important decisions. Essentially, it’s your very own tee brand!

Every few weeks the latest winners are announced and their design will be printed and made available for purchase from the Wooshka online shop. Just 500 units of each shirt is printed to ensure the prints remain as limited edition.
The participants who submit the winning designs, as selected by Wooshka after score and comment review, will win cash and a Wooshka Gift Voucher when the design is first printed

T-WORLD: THE JOURNAL OF T-SHIRT CULTURE

What they said :

T-world is the world’s only printed T-shirt journal dedicated to the art of T-shirt culture. We’re made in Melbourne (Australia), but distributed into over 15 countries. We’re released twice a year, but if you want your weekly T-shirt fix then come on down… (more…)

whitazee by webgrrl

Today’s Best Award 

Today i received TWO “Zazzle Today’s best award”!
One for the Summer Holidays Frosted Mug, and this t-shirt, which i designed yesterday. This design looks best on light colored tshirts and tops..

WARNING : If you are easily offended (or totally lack sense of humour) then this site is NOT for you!

Minimal designs (artistically) but maximum humour (of the dry/black/offensive kind), one of my favourites would have to be the “I’m Should to be in the Kitchen” t-shirt. Prices are really good too, starting at $18 USD (not including delivery) and you can customize by choosing style and colour of tshirts you want the print (prices will vary depending on styles, etc). There’s even a Black Market area!

Read further for other exciting good/bad things u can find on their site, including Design Competions and how you can Make money selling their t-shirts..

(more…)

Check this site out, that i found today. A clean cool site where you can get and exchange ideas, but best of all, a place where t-shirt designers can give and receive knowledge, inspirations to and from each other.

Emptees is about the art of tee shirt design. A place where the world’s best designers can come together on common ground to show off, talk about, and love tees.

(more…)

PSYKEYE T-Shirt by webgrrl
Get this custom shirt at Zazzle

Today’s Best September 25, 2007

Buy ‘LotusCircles’ T-Shirt by webgrrl

Saraswati by thickblackoutline
Get this custom shirt at Zazzle

She’s spreading the goodness! Keep a watch on ThickBlackOutline’s collection coming very soon, join her fan club

fractaltree by webgrrl
A great design on all styles of t-shirts available from Zazzle.

psychedelic-TEES #001 bywebgrrl
Get this custom shirt at Zazzle

I designed this last night, and received an email today to inform me that this was picked as

Today’s Best (16th Aug 07).

How exciting!!