Some useful links around Azure billing:
- Windows Azure Billing overview: http://blogs.msdn.com/b/patrick_butler_monterde/archive/2010/02/10/windows-azure-billing-overview.aspx
- Windows Azure Offers: http://www.microsoft.com/windowsazure/offers/
- Windows Azure Platform Offer Comparison: http://www.microsoft.com/windowsazure/offers/popup/popup.aspx?lang=en&locale=en-US&offer=COMPARE_PUBLIC
- Windows Azure 30 days pass: http://www.windowsazurepass.com/
Some customers also asked me where they can find their billing info. Therefore go to http://windows.azure.com and login with your live id.
On the Windows Azure Portal, you can find a link to the billing information in the right corner. If you click this link, you will be redirected to the Microsoft Online Customer Service Portal (MOCP) where the info is available.