I'm plannig to make some T-shirt pattern and sell them on webpage which offers different t-shirts, mugs, underwears and teddy bears with special logo or pattern on it. Also on this page you can create your own T-shirt identically. You can choose the colour of the T-shirt and your own pattern on it. I've ordered one for my boyfriend as birthday present. I'm sure it'll be a perfect surprise. ^^
About my patterns. I made character which looks like a kind of bunny-thing, to tell the truth it's only a head. It's like those MSN smiles and things like that. I'd like to turn this bunny-thing to a registrated trademark but still I'm not sure about it.