I'd like to turn it into one of the official NetBeans tutorials. But, I guess, the Database Explorer API would need to be stabilized first, which I don't think it is currently. I needed to set an implementation dependency on it. Also, maybe the final plugin could be included in the Plugin Portal, because clearly this is a very useful piece of functionality that adds real value to the user's database activities when working with the IDE.
In other news. Tried it successfully in 6.0 Beta 1 and got permission from Toni to put it in the Plugin Portal, as a sample. Go here to get it. (By the way, I updated yesterday's Feature Viewer, to 1.5, and now there isn't a problem with dependencies anymore, although the Print Preview is disabled now.)