I found myself wanting to use NodePie to surface content from rss feeds in my project, but discovered that the feeds I wanted weren't standard. This lead me to forking your project so that I could expose any element of an rss item.
I don't know if you want to include this functionality, but I thought I'd send you the pull request in case you wanted it.
~ Chad Hill (JavaChilly)
expose all item elements via getElement(name) / hasElement(name)