From AdWords Logins to Google Accounts

The Inside AdWords blog has a brief but fact-filled Q&A style post about Google updating AdWords logins to Google Accounts.

Though updating to Google Accounts will remain optional from October 19, 2005 until January 15, 2006, we advise you to complete the process and begin using your new Google Accounts login as soon as possible. After January 15, 2006, you'll need to update before you can access your account.