While spending time on the Propeller forums I got involved in an awesome project to make a Propeller based complete Z80 system emulator. There are a few different boards about that are "standard" platforms for extended memory applications, all called blades of some sort. One I particularly liked because of the elegance of the design was the DracBlade. The PCBs were sold through the forum at a very reasonable price, I put mine together from bits from Farnell.
When I was putting together my board (a Rev 5 board) I decided to bypass the level translator chip for the programmer connection and add a header to attach the standard Parallax Prop Plug programmer. This turned out to be a really easy mod with just a couple of wires to fit and the connector fitted in the 4 lower pins of the DB9 socket footprint which were unconnected to anything else.