Following the announcements at “Meet Windows Azure” event, we now have three options to run SQL Server on CLOUD; They are:
1. SQL Azure which is now called Windows Azure SQL Database
2. SQL Server on Windows Azure VM Roles (Nice addition, in my opinion!)
And apart from these options,
if you can fire up a VM on cloud and decide to run SQL Server on it – that’s also SQL Server on CLOUD.
Update 22 June 2012:
Naveen commented about running SQL Server on Amazon EC2.