Hi Iceman,
I see, well I know PayPal is constantly adding more services and features so maybe down the road who know's. But have you checked out these guys?
http://www.avangate.com/company/I know this is who OBD (Over Flanders Fields BHaH) uses to distribute their software and collect payment for them. Looks like they can set you up so your software can be digital downloaded from your site or sending out hard copies or both.