I tried it... It doesn't do osT justice and stores some data on a remote server.
That's a no-go for me.
I am working with some developers for the specific purpose of making a plugin for WP that brings a tight integration between the two, but will allow for the use of current mods and customizations.
I'm debating on whether to proceed with 1.6ST or to wait and see what 1.7ST has to offer. I'm sure the code would be stable, so I'd really rather wait if its going to be before the end of 2012.