The puppet editor tips page seems to suggest that using eclipse & dltk (presumably the ruby tools) will assist with editing .pp files.
http://projects.puppetlabs.com/projects/1/wiki/Editor_Tips
I can't see any difference or get syntax highlighting with DLTK 1.0 and the ruby plugins installed. Is there something I'm missing or eclipse configuration I need to set for it to start doing syntax highlighting and validation of my puppet model?