Alongside Mac OS X 10.7.4 and to address roughly the same set of vulnerabilities, Apple has released Security Update 2012-002 for Snow Leopard and Snow Leopard Server. The fixes revolve around the open source components of Mac OS X (including curl, Ruby, and Samba), directory services, and dealing with maliciously crafted files in ImageIO, QuickTime, and various other internal libraries. Unlike some other recent Apple updates, we haven’t seen any widespread reports of problems. (Free, 238.73/258.11 MB)
Single Time Machine Backups
Tired of Time Machine running all the time? You can turn it off in the Time Machine preference pane, but still initiate a single backup by choosing Back Up Now from Time Machine's menu bar icon. Of course, your backup is much less likely to be up to date, but Time Machine won't be taking any resources while you're trying to work.
Security Update 2012-002 (Snow Leopard)
to your own drives, friends, and online with unlimited storage.
With 30 days free, backing up is one resolution you can keep.
Your life is digital; back it up! <http://tid.bl.it/code42-tb>
I recall reading somewhere (probably TidBITS) Apple staggers their software update notifications to keep their servers from being overwhelmed.