On customers' demand Microsoft has added a detailed FAQ page on their MSDN documentations in addition to the existing FAQs on the website.
The current content is mainly focused on Service Bus pricing questions, but the company will be updating this page frequently, so please make sure to check back often.
Here's a the new Windows Azure AppFabric FAQ page on MSDN:
You can also find general FAQs on the Windows Azure Platform FAQ page on website, and filter these results according to different categories.
More general pricing information can be found on the Windows Azure Platform Pricing page.