KWymore (11/30/2011)
I have not yet seen sql variants actually used in production but then again, we have very few 2008 instances up and running.
There is no connection between sql_variant and SQL Server 2008. This data type has been around since at least SQL Server 2000. (I think even before that, but I could not find evidence of that, and I'm not sure if I can trust my memory anymore).