Implement a mechanism that pushes testsuite results to a repository, similar to the way in which Formaline pushes the source tree while building.
This could be implemented in Cactus (after running the tests), or in Simfactory (during cleanup). It is probably preferable to have this in Cactus.
As with Formaline, there would be a new repository created for each test suite run. This repository would be pushed to a (possibly remote) repository. It may be useful to have other repositories, e.g. one per source tree, and one per machine, as intermediate "collectors". Such intermediate repositories reduce the amount of data that need to be transmitted to a remote server, and act a buffer that retain information in case (a) the remote repository is not accessible while (b) a local repository is deleted.