Apple is updating many systems this week (in paritcular today) to get ready for the iPhone 3G launch and the new "MobileMe" software. Its not exactly within your scope to cover product updates or releases like that. However, some of the updates released today are security relevant. For example the new AppleTV software includes a number of security patches. A new version of Quicktime ( 7.7.0.43) was released as well (thanks David!).

It is not clear if the new version of iTunes (7.7) released today includes any security fixes.

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Johannes B. Ullrich, Ph.D.
SANS Technology Institute