For those working with Azure, you can take a lease on a blob to manage concurrency: http://blog.smarx.com/posts/managing-concurrency-in-windows-azure-with-leas

For those working with Azure, you can take a lease on a blob to manage concurrency: http://blog.smarx.com/posts/managing-concurrency-in-windows-azure-with-leases http://blog.smarx.com/posts/managing-concurrency-in-windows-... It also has high availability, lease expiration timeouts etc.