Rejigged the link from the child node to the parent to point from the child node (rather than child node version). This restricts us to a design where we always create new nodes for new versions of a parent. Also made the lookup of child nodes manual (rather than loaded automatically by hibernate). Doesn't use lazy loading - goes direct to database to find node. Not so nice. But the changes have almost doubled the throughput in my testing.
Change name from com.lamsinternational to org.lamsfoundation. Changed all the entries I can find but the jar file still contains a folder reference it appears.