are there any plans for NRF52 USB development dongles (just like the NRF51 dongle)?
Just a short help if you try to use the "ABSniffer USB Dongle 528" as nRF52 Dongle. To program the nRF52 you need to connect the J-Link to the pins marked in the picture below.
Thanks Adrian Eggenberger, that was helpful. I did a little write-up of flashing the dongle with custom firmware (in this case iBeacon) here, if you're interested:
Kudos to AprilBrother for allowing and documenting it!