The goal of NimBorg is to assimilate multiple programming languages into the Nimrod ecosystem. In other words, I aspire to develop here high-level interfaces between Nimrod and other languages. Currently we have very basic support for python and lua.
The current state of the bindings can be observed by looking at the 'test' directory for each of the languages. There's also a "usage.txt" file under nimborg/py and under nimborg/lua, but it might occasionally get out-of-date, so the tests are more reliable.
This project is extremely young and the API may change without notice. If you use something and it stops working, you're invited to send a message to biosap at gmail dot com and I'll try to help you adapt to the change.
Before you report a bug, please check whether you can reproduce the problem using the latest nimrod compiler (devel branch, https://github.com/Araq/Nimrod). If the problem is reproducible with the latest compiler, please open an issue in https://github.com/micklat/NimBorg/issues.