Virto Active Directory User Service is a web part for SharePoint 2007 allows managing data of Active Directory database users. Web part includes two components - Self Service (for working with your own data) and User Service (for management of other users' data). Being combined in a single solution, these two web-parts provide users with powerful tools for managing and editing Active Directory User Profile while being logged into SharePoint Site.

Active Directory Self Service Web Part for SharePoint 2007
AD Self Service Web Part enables users to manage their AD account by themselves. Any authorized SharePoint user with the help of this web part can quickly change his mobile phone number; add date of birth, car number and any other data of his profile. This is very useful tool that enables to cut time of system administrators which they usually spend on users' data management.

ctive Directory User Service Web Part for SharePoint 2007
With the help of User Service component you can manage not only your profile but other users' data (if it is allowed by the system security settings). When the web part is adjusted, it is pointed, which SharePoint group will be able to manage other users' profiles. It is also defined which exact data will be available for editing. For instance, you can allow human resources manager to change posts of other users, but personal data (first and last names) will be unavailable for editing.

All Active Directory users are displayed as a list sorted in alphabetical order. It is also possible to find any user with search tools. Web part enables to view user profiles in a special window where all the data are grouped by type (personal data, job details, contact information and etc).

More info at http://www.virtosoftware.com/Sharepoint-active-directory-user-services.aspx