I integrated Atmosphere into a Dropwizard-based project (not on GitHub yet, hoping to get it out there in a week or two -- look for Cyranix/mi5 if interested). Although I did get it to work, it wasn't a smooth experience. There seem to be many ways of accomplishing the same thing which are just different enough to trip you up in subtle ways (at least if you're only a moderately experienced dev like myself), and the documentation is a bit of a mess (scattered, not well translated from French, etc. -- not entirely, but enough to be a pain). Any JavaScript devs interested in this sort of tech could make a much-appreciated contribution to the project by making a client-side script that doesn't depend on jQuery.