I've been meaning to play with it for a while given its recent popularity and a couple of weeks ago I casually committed to taking part in the Node Knockout(a node.js event inspired by the Rails Rumble) next weekend. Competitions like this are a good way for me to convince myself to learn new stuff and they're fun. The first Rails project I spent a decent amount of time thinking about was for the Rails Rumble a couple of years ago.
One of the big issues I initially had was getting stuff to split into separate files nicely instead of massive scripts running the entire system. But that turned out to be relatively straight forward to fix once I got a better idea of what was going where and a handle on module system that node provides.