And for a slightly more modern take on the tuple space, check out Java Spaces [1] or Gigaspaces [2]. There's still plenty of active research on the topic too [3] (disclaimer: I did my PhD thesis on distributed tuple spaces).

I've long contended that a tuple space was basically a generalised key-value store, so it's nice to see projects like this one crop up.

[1] http://java.net/projects/jini/

[2] http://www.gigaspaces.com/

[3] http://eprints.utas.edu.au/9996/