If this turns out to be true, it will be very interesting: Journaling File System Layer to appear in Mac OS X 10.2.2.
The odd thing is that this is appearing on a dot-dot release. Was this a feature that was meant for 10.2.0 but didn't make the cut? Note that Journaling, which adds a 10-15% performance hit to the operating system, is turned off by default.
Of real interest - Apple did bring in Dominic Giampaolo a while ago. Giampaolo wrote BeOS's journaled BFS file system. With luck, more BFS features will find their way into Mac OS X, allowing OS X to beat Microsoft's Longhorn/Yukon projects to market.