A feature I commonly saw used in SP 2003 but not so much in MOSS was personalization. This is the ability for your end users to have a shared view and a personal view of their page. By default when you create a collaboration site or publishing site you may notice there are not options to personalize your page. If you were to create a team site the options would be there.
You might be asking where one would look to see these personalization options. Another common mistake is to look at the Site Actions menu, but no these options would be under the Welcome xx menu often displayed in the upper right hand corner of the page. This is because the changes are tied to the user’s profile.
To enable/disable personalization you will need to modify the AllowPersonlization property in your web part pages. As long as one of these zones has AllowPersonalization="true" you will then see the options to enable your end users to personalize their page and specifically to personalize only those zones that you denoted.
Enjoy! Yvonne M. Harryman