I've copied the current head of rce/trunk to rce/branches/new-ppi-interface to create a branch for the code described here. The branch appears starting at revision 1313 of the repository. For now only the RCE project has such a branch but I may have to add it to other projects later on.
The new package ppi/ will contain the actual interface code. The logging service code from quarks will be moved into rce/service. The core-making code from rceapp/ will be moved to rce/core since the core will no longer be built in the same way as an application (see the JIRA issue PTC-13).