I created a MyCase on your question and was called back by phone within 10 minutes!!!! THAT WAS FAST!!!!
There is a new PSoC5 Kit announced (which is currently out of stock) with a snap-off KitProgrammer. With this you will be able to program PSoC5s, PSoC4 and PSoC4 BLE (I admitt:Ididn't aski for PSoC3 and PSoC1) without any modifications on one of your boards provided that you have the needed pins availlable and you can live with a 5V supply form the KitProg.
There is a hack posted to modify a pioneer kit to program PSoC4s, but I am not sure wheter that will program BLEs.
My answer would be 'yes, as long as your custom board uses a PSoC4BLE chip'. Just connect the SWD lines from the breakout header on the Pioneer BLE board to the ones on your custom board. Maybe look up the breakout board schematics to see how to design that part of your board.
I do plan to use a BLE chip. Thanks for the answers (I probably should have searched a little more before posting...)!
the socket which is used for programming is 20021521-00010T1LP
Which you could solder to the board
Adafruit also sells the SWD ribbon cable
Hope that's helpful