The War is Hell t-shirt is a pretty damn arresting image. Kind of puts things in perspective, although in the immortal words of spinal tap “Too much, there’s too much fucking perspective now”. I’m actually not sure I’d wear the shirt myself, it seems almost exploitative.
Of course Zeroboutique has lots of more light hearted designs, all hand screened on american apparel.
Unfortunately I can’t deep link to the shirts themselves so you’ll have to dig around, on a side note to anyone trying to sell anything online, make sure people can link to individual products, that is how people talk about your products online. If you hide all the links to your products using frames or flash you are stopping your customers talking about your products.