What's needed right now if you're contributing:
- integration tests, particularly for TestNG (I believe they have examples in their source tree which we might want to wrap up as maven projects)
- review of any further changes on the branch for inclusion
- normal review/patches for JIRA
JIRA is currently up to date with the roadmap for Surefire. The large number of issues in 2.4 are expected to fall out quickly as test coverage increases.