appframework says it all. dependency of netbeans. therefore in the process of packaging it. release 0.5 only available from svn they are hoping to stabilise API for 0.51 and then make new release.
Ebuild available in java-experimental, requires jnlp so can't build it on amd64. Hopefully the ebuild can just be keyworded for other arches tho. (using netbeans build.xml files)
*** Bug 244789 has been marked as a duplicate of this bug. ***
In Tree so closing