At Pronovix we've been thinking about distributed service systems. I was asked to do some background/proof of concept research, and after one day, here is the first experimental module, called remote blocks.
The first thing what I want to say about this module, is that the access control is currently omitted, because I haven't find a really easy and clean way to do it (something what works in 5 minutes).
On the first screenshot, you can see the module's admin interface in my Drupal sandbox.
