If you use Eclipse, you'll be pleased to know that the repository contains an Eclipse project file. To get going, choose "Create a new project from existing sources." This should import all that is necessary into Eclipse.
Eclipse, Nutch, and the class path
You can end up in a mess with the class path, since ant has one way of managing the class path, whereas Eclipse has a second. So things that work in Eclipse can fail in the ant targets.
FIXME: Write more problems and solutions here.