The Sixth Edition of the HERO System was released at GenCon 2009.
From the company web site:
The HERO System, 6th Edition: The best just got better! At GenCon 2009 Hero Games will release the Sixth Edition of the award-winning HERO System, in two books: Characters and Combat And Adventuring. Come by the 6E Discussion message forum on the Hero Games Discussion Boards to learn more and offer your opinions and suggestions about how to make the best RPG ever created even better!
The HERO System Basic Rulebook: For gamers who don’t need the full Sixth Edition rulebooks all the time, Hero Games presents the Basic Rulebook — the 6E rules boiled down to a 128-page guide. The BR strips out all the options, variants, and expanded rules discussions to present you with the absolute core of the HERO System so you can easily learn the game or find the rule you want.