You guys must not have visited the link, so lots of you have the misconception that it just enables auto-block. It doesn't. Judging from what I read on the website before the link was removed, you run a separate executable in the background. You change your in-game block key to middle-mouse button, and hold the right mouse button to activate the background executable. It automatically detects incoming attacks and triggers middle-mouse as necessary.
It isn't enabling the current autoblock mechanism, it quite literally blocks automatically. At least with the game's autoblock you have to press RMB in time with your opponent's attacks, this just triggers a new block every time the attack direction changes. In a 0-ping environment it would follow feints perfectly regardless of the speed at which they're performed.
Spec said:
I know of at least one coder currently working on sth to counter the use of this, by the way, so fear not.