Beginning October 1, 2011, Microsoft will make two pricing related updates to the Windows Azure Platform.
First, the price of extra small compute will be reduced by 20 percent. Additionally, the compute allocations for all of the offers will be simplified to small compute hours. Additionally, current Introductory Special offer customers and customers who sign up for this offer prior to October 1 will receive both 750 extra small compute hours and 750 small compute hours for the months of August and September.
Details about this pricing update can be found at http://blogs.msdn.com/b/windowsazure/archive/2011/08/15/announcing-simplified-data-transfer-billing-meters-and-swappable-compute-instancess.aspx and some extra comments at http://www.zdnet.com/blog/microsoft/microsoft-to-cut-its-low-end-windows-azure-cloud-pricing/10343.