It sounds like the Linq that everyone is talking about here is just LinqToObjects. Which I believe only offers functionality that can already be accomplished today in Java, but with really ugly syntax.
What I see as the real power of Linq in .Net is that lambda expressions can be used in a context requiring either a Delegate or an Expression and will then be compiled into the appropriate form. This is what allows things like LinqToSql (or anything other than LinqToObjects) to work, and allows them to have a syntax identical to LinqToObjects.
It looks like all of the projects referred to above are only offering the capabilities of LinqToObjects. Which makes me thing that LinqToSql-type functionality is not on the horizon for Java.
