Pricing and licensing overview:
http://www.microsoft.com/azure/pricing.mspx

ex:
Windows Azure: 

• Compute = $0.12 / hour
• Storage = $0.15 / GB stored / month
• Storage Transactions = $0.01 / 10K
• Bandwidth = $0.10 in / $0.15 out / GB

 SQL Azure: 

• Web Edition – Up to 1 GB relational database = $9.99
• Business Edition – Up to 10 GB relational database = $99.99
• Bandwidth = $0.10 in / $0.15 out / GB

 …