The Yeoman command line, when you run "yo --help", shows you the available Yeoman generators that you have installed:
Integrating Yeoman into NetBeans IDE means that you want to let the user make use of those generators from within a New Project wizard, i.e., as discussed in this blog yesterday. So, here you go, thanks to Steve Souza (sitting on the couch at Concerto in Amsterdam next to me, great coffee and free Wifi hurray) and me:
The code for this is here on GitHub: YeomanHelpParser.java. You'll see the Yo executable is hardcoded, that's one thing I'll be working on, via a new item in the Options window.
Now that the above is done, things are looking pretty good. The user will select one of the installed generators (there'll also be a list of available generators that haven't been installed yet), click Next, and then the "yo" command will be called from NetBeans, the app will be generated, and will open automatically as an HTML5 project (from existing sources) in NetBeans. (JBoss Forge and LazyBones support for NetBeans should be implemented in a similar way.)