Another build of Inform has been released; this one is less dramatically changed than the last, though it does get rid of a bunch of bugs. It also introduces lists, so you can have a growing sequence of numbers (say) without having to know how many there will be when you create the property or variable.
My favorite new example uses that feature and several features of the previous build to create Robo, an NPC who can learn action scripts and perform them back on command.
The syntax document has also been re-updated with the new syntax for list-management.
Emily Short's Interactive Storytelling 