Are there some docs I can look at?

nothing? Its been a month since my previous comment.

+1 (at least a quick start guide!!)

(now i saw this: http://code.google.com/p/gwt-exporter/source/browse/trunk/samples/src/exporterdemo ... it helps!)

Take a look to this: http://code.google.com/p/gwtchismes/wiki/Tutorial_ExportingGwtLibrariesToJavascript_en

Added wiki pages http://code.google.com/p/gwt-exporter/wiki/GettingStarted http://code.google.com/p/gwt-exporter/wiki/MavenConfiguration http://code.google.com/p/gwt-exporter/wiki/Articles