I think giving photographs away for free is a FANTASTIC idea. Since you're obviously going with a coffee shop theme, I think I can help.
The lighting for this shot consisted of continuous overhead fluorescent tubes with a textured clear plastic diffusion panel, coupled with a strobed blink with a 24" iMac monitor, on lens axis, just below camera. Camera was built in to the top edge of the aforementioned iMac monitor, effectively tethered to the iMac. Camera control software was Photobooth, which I believe comes bundled with Mac OS X (Snow Leopard). Alternatively, I think it is available as part of the iLife suite.
I spent literally several minutes on the post processing, mostly because I don't know where Photobooth dumps files by default. Anyway, I couldn't decide on which look I liked best, so here's a sepia toned, b&w, and the original. All except the original have adjustments to WB, contrast, and heavy sharpening (all PP done in Mac Preview, adjust color panel).