For many of you using Windows Azure, you may have noticed there is no good way to get from the new portal experience to your billing.
(You may have not noticed yet, if you like to pay bills without reviewing your statements, and that's fine too.)
We're aware of the issue, and there is a good explanation behind it, in that there are some more features to come which will make interacting with billing data ont he platform much easier.
For now, however, you will have to either revert back to the old portal experience (which will be deprecated soon), or use this direct link: http://go.microsoft.com/fwlink/?linkid=168901
Hope that helps.
[ Update - 16 Dec 2010 ] We have added a Billing link back on the new portal, so you should have direct link access to the MOCP portal to check bills, etc. Enjoy!