Today I did a test build of the current source, and it went well. About 35 new test files were added to the test suite, and most of them pass. There are about five test files that are known to fail on MacPerl, and now seven more are failing, which need to be looked into (another five failed, and I've fixed, and will submit patches on later).
There are still some open bugs preventing MacPerl 5.8 from being released, but at this point, I am certainly going to wait for perl 5.8.1, since it is on the horizion.