Someone from the Power BI team will probably have the definitive answer, but there's a lot of activity on the Power BI Support forums, notably https://support.powerbi.com/forums/268152-developer-apis.
As Dan says, for now we don't have developer or api discussion boards here.
The link provided (https://support.powerbi.com/forums/268152-develope
If you would like to see something here, please let us know in the community feedback topic.
Thanks guys w.r.t providing rhe link to the dev.powerbi.com and for providing feedback. I was already aware of these but I think that there should be a way of navigating to those areas from within this site. That way this site becomes the "Home" site for the Power BI community (of which development is a key area) rather than having to remember separate areas for different needs. I'd like to see everything unified under the one banner (this site) - the simplest way would be to include links from here or create an Developer API board (in my view).