From the "strange but true" department...
Eight or nine years ago I needed to interface PowerBuilder with a very old system (old as in written by a company called IV-Phase Systems in the early 1970s) which runs on UNIX systems. In the end I decided to reverse engineer the DPB service and network interface and wrote a TCP/IP service for SCO UnixWare in C++ that "looked" like a DPB Server. The service worked well and as far as I know, the hospital I wrote it for still has a PowerBuilder 7.0 DPB clients talking to their UNIX systems via this service.
I'm sure that if SAP was to dust off DPB and put it into PowerBuilder 15 I could knock on their door and sell them a considerable amount of time upgrading and enhancing their systems. That really was a fun project. 