Just like a real Mac user - or I think, because I've never had a real Mac let alon be able to update one - all I did was run Software Update from the Apple menu and restarted.
For those who are starting from scratch (following the current setup guide) or are skipping point updates, grabe the ComboUpdater from Apple's Site.
Anyways, 10.6.7 doesn't seem to be deliver any major system changes like USB management, power etc. - details listed at the site are only:
- Improve the reliability of Back to My Mac.
- Resolve an issue when transferring files to certain SMB servers.
- Address various minor Mac App Store issues.