[reactive] automatic recompilation/re-execution?

In the mailing list announcement, one of the potential uses of this library is "automatic recompilation/re-execution." This sounds very interesting, is there more information? Is this at all similar to "Living it up with a Live Programming Language" [http://lambda-the-ultimate.org/node/2149] ? Also, are there any tutorials that show how this library can be used (rather than just explaining semantics)? Thanks