I built this landing page at the end of the last Ludum Dare compo/when Notch began streaming his Doom build.
I'm currently trying to think of ways to attract developers to stream. There seems to be lots of interest in people wanting to watch good quality streams but I feel the challenge lies in providing these good quality streams.
I plan on streaming myself building the MVP in the near future.
I'd recommend focusing on a particular niche of developers who all gather in one place, and who have a strong interest in learning more and watching others code. Game developers would spring to mind but I'm sure there are other even better groups for what you intend.
Then, if you can persuade one or two of the stars of that community to use your platform, you should get a decent amount of starting traction.
Looking forward to seeing how you get on!
I recommend having a read of this other discussion thread further up the page: https://news.ycombinator.com/item?id=8312701