are there any plans for NRF52 USB development dongles (just like the NRF51 dongle)?
I don't know but will find out. Since monday and tuesday are off for us, i will comeback to you on wednesday
Not sure about dongles, but nRF52 DK can act perfectly like a dongle. You will need to install an application called nRF Connect and flash the device with a special image, detailed instructions provided on this page: devzone.nordicsemi.com/.../
We do not have any plans for making nRF52 dongles in the near future. But that might change if more users are interested in using it.
+1 for nRF52 USB Dongles (+2 with break off board, e.g. www.cypress.com/.../Figure 4-4-1.jpg)