Anton Arhipov (a drools contributor who has worked on some Eclipse stuff in the past) – got a proposal accepted as a Google Summer of Code project.
His project is to make Guvnor (the BRMS) work with multiple content types – and more importantly have “pluggable” content editors (something that is kind of new to do in GWT – as GWT code is statically compiled into javascript).
He blogs about his experiences here.