Since I posted the Apple update 10.5.5/Security Update 2008-006 earlier, I thought I might go ahead and put all the Apple Updates that have come out in the past week

1)  iTunes 8.0 -- Security related updates here.

2)  iPod Update 2.1 -- Security related updates here. Referenced here by Adrien.

3)  iPhone Update 2.1 -- Security related updates here, already posted by Mark.

4)  Bonjour for Windows 1.0.5 -- Security related updates here.  Referenced here by Adrien.

5)  Quicktime update 7.5.5 -- Security related updates here.

I recommend applying all of these, obviously, as there are some pretty vital updates buried in here. 

-- Joel Esler http://www.joelesler.net