Slashdot comments on an article stating that Mac OS X 10.2.2 will have an optional journaled file system.
At a speed hit of 10-15%, the JFS will give the system a file transaction history. BeOS used this and it was GREAT. After a crash, a 10 second rebuild is all that was needed to fix the disk.
Oh yeah, yeah, the same guy that wrote the Be’s JFS wrote this one!