Hi all, I've just been through the process of configuring Eclipse to build and run James, following the instructions here: http://james.apache.org/server/3/dev-build.html
The only addition I needed to get it working was to download open-jpa from http://openjpa.apache.org/downloads.html and add in -javaagent:/path/to/extracted/binary/openjpa-2.1.0.jar to my Eclipse Run Configuration in the VM arguments field. Not sure if this is unique to my configuration or not, but it might be worth adding it into the dev-build page above, if this is the "right way" to do it! Martin