Both technologies seem to have shifted toward center stage as the default "cool" stack to develop on. Neither perform particularly well, and those that say they do have yet to demonstrate (to me at least) that this is true with actual numbers. Javascript as a language is poorly designed as a server language, doesn't support hot swapping, isn't object oriented, and misses a number of features other functional languages enjoys (sensible typing being one of the biggest ones). The choice to use MongoDB "to learn something new" is wrong for something that you actually hope others will use. Better reasons would be something like: "my ideal architecture uses a data model perfectly suited for MongoDB," in which case, I'd ask why not use a different document based db that actually scales. Or, "I'm a mongo expert that can do crazy tweaks to make mongo fly."
This whole thing just doesn't seem well thought out, and I certainly will not invest any of my own energy into it or expect anything to come out of it.