UPDATE May 2011: I've just ordered a print run of 250 premium hand-letterpressed art prints of this design, which I will be selling at £15 each. The printing process will give them a lovely vintage look and feel completely unlike digital printing. The prints will be black ink on creamy white 300gsm Somerset 100% cotton paper, A4 size (210 × 297mm, 8.3 in. by 11.7 inches- may also print a small run at larger size if these are successful). If you'd like to register your interest (no obligation), just leave a comment or send an email at email@example.com .
"All the world's a stage, and all the men and women merely flowers..."
This was a pen and ink drawing which was printed on a t-shirt a few years ago by Threadless [link]
(no longer available, sadly!). There is also a copy of the artwork on permanent display at the Royal Shakespeare Theatre in Stratford-upon-Avon.