MS Volta: Boundaries Are Implicit
It looks like Eric Meijer has taken retiring the the four tenets to heart. In his CTP announcement blog entry, Meijer states that Microsoft's project code-named Volta, service boundaries are crossed by decorating a class with [RunAtOrigin] and configuring for the origin on the application tier (disclaimer: I haven't yet looked at the implementation details of Volta).
This does not bode well for the contract-first folks and doesn't seemed to be aimed at long-lived commercial software. That focus would fit in well with Linq to SQL's target audience though.
I guess life is a mashup.