If you are a software company developer planning to convert your on-premise application to Windows Azure you should be aware of this tool.
The Microsoft Research eXtreme Computing Group cloud-research engagement team supports researchers in the field who use Windows Azure to conduct their research.
As part of this effort, they have built a desktop utility that measures the upload and download throughput achievable from an on-premise client machine to Azure cloud storage (blobs, tables and queue).
The download contains a desktop utility and an accompanying user guide. You simply install this tool on an on-premise machine, select a data center for the evaluation, and enter the account details of any storage service created within it.
The utility will perform a series of data-upload and data-download tests using sample data and collect measurements of throughput, which are displayed at the end of the test, along with other statistics.
Add this to your toolbox.
My thanks to Tejaswi Redkar for alerting me to this.