I also have the same question. I have a BPMN2 XML that was created in Eclipse. Now I want to import/view that in Guvnor.
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Update: You need to add the JBoss/Drools Guvnor plug-in: http://www.jboss.org/tools/download/installation/update_3_2.html
Once that is installed, the "Right Click On the BPMN -> Guvnor" option appears so that you can "upload" to Guvnor.