Apple seeds first Mac OS X 10.4.7 builds...
Apple has apparently started seeding developer versions of the next update to Tiger. Current builds, according to sources, are numbered 8J2111 (intel) and 8J111 (PowerPC). Those numbers indicate that both builds are now really developed in tandem.
There are a lot of areas in OS X Apple's working on this next update. The delta updaters are roughly 65 MB (PowerPC) / 128 MB (intel) in size. The areas Apple's specifically seeking feedback on in this early build are Mail.app, WebKit/Safari, Aperture, Syncing and iChat.
Since Apple's next big hardware announcement is probably quite some time off (unless they intend to bring something totally new but still Mac along) until the Mac Pro machines come out (expected at WWDC in August, currently...), our sources assume that work on 10.4.7 is mainly aimed at fixing bugs in 10.4.6 and adding one or the other feature. We'll keep you posted.