Lambda the Ultimate

Old news, but didn't see it mentioned on LtU yet. There have been a few revisions released already:

2009 May 19: The Timber compiler 1.0.3 released.

The overall purpose of a Timber program is to react to events sent to it from its execution environment. This process is potentially infinite, and the order of external events is also not generally known in advance.

To capture this intuition, Timber defines its primary run-time structure to be a set of interconnected reactive objects, that each encapsulate a piece of the global program state.