Anyone out there who's been on the 'illustration-onto-tee' website Threadless will no doubt recognise the work of Aled Lewis. He seems to have so many fun, witty ideas spilling into his sketchbook, out of Illustrator/Photoshop and onto t-shirts forcing me to question myself "Why didn't I think of that?" in envy.
Do yourself a favour and click here to see more of his work. Go on, it'll put a smile on your plate.