Nodyn is an effort to run node.js apps on top of Vert.x. JavaScript alone is not enough to make Vert.x popular for node.js people. You need to be able to leverage the node.js module echosystem. Hopefully Nodyn will do that, so you can use your favorite node modules on Vert.x. It's still a work in progress though.

Cool, Nodyn looks interesting. Thanks for the info.