The idea here is pretty simple: it's an organization for osm-related modules, code, and data. There are simple guidelines - https://gist.github.com/tmcw/5157262 - which equate to "try to be approachable and open to contributors". As such, anyone who wants to pull request / get commit to a project and has cool ideas, just ask. Also, it's going to be all liberally-licensed projects - BSD, MIT, and PD.
So far it's been small modules, and one that might be pertinent is osm-auth. The OAuth implementation in iD has already been open & modular as 'ohauth' but the steps between that no-assumptions implementation and a working integration were too much.
It has a simple API, focused on logging in, out, and doing api calls. There's a quick demo of integration: http://osmlab.github.com/osm-auth/ which should be a great starting block for other projects. It's PD code, and uses ohauth behind the scenes.