Seeed received a copy of version 3.11 for IAR4 sometime last fall and I also gave them an update a month or so ago. The latest update is a port of v3.11 (now 3.13) to IAR 6.1 with a more streamlined/portable APP/LIB interface. Seeed is free to use either of these copies any way they see fit with no strings attached whatsoever. If and how these versions will be distributed is entirely up to Seeed. Beyond this I have no plans towards releasing additional source here or elsewhere.
I’m happy to take part in discussions on using the Nano as a measurement tool and contribute anyway I can to improve it further as such. Supporting “wannabe” programmers however is beyond my capacity and perhaps others can pick up this challenge.