The best way to convert paper drawings to digital images ?
patio11: Scan it, ship it off to your outsourced art talent, tell them what sort of deliverable you need, and let them worry about how they accomplish it.  They're the professionals, after all.(Outsourced artistic talent is very, very cheap.  Find somebody you like on one of the sites, develop a working relationship, bring them work on a regular basis.  Its a win for you and a win for them: you don't waste your super-valuable time doing low-value-added tasks, they don't have J. Clueless Client asking for 15 revisions and then dickering around with actually paying them for services rendered.)