When composing a message in Gmail, users can now just click the 'To:' link to access Gmail's contact list. Before, the Gmail contact list was available through a link labeled 'Choose from contacts'. Contact sharing must be enabled in the control panel for this feature to appear.

Editions impacted:
Standard, Premier, Education and Partner Editions

Languages impacted:
US English

How to access what's new:
To select recipients from your contact list when composing a message in Gmail, click the 'To:' link next to the box for recipient addresses. Similar 'Cc:' and 'Bcc:' links are available if you click 'Add Cc' or 'Add Bcc'. Contact sharing must be enabled in the control panel for this feature to appear.

For more information:
http://www.google.com/a/help/intl/en/users/gmail.html