I found the old version from Geeks3D and Googled the website, but it was down, so I searched across the Internet for it, and found this... Just in time for 35.00.

I found it by seaching up "powder games" in google
In addition, I probably introduced many people from my high school to the game (old version)

I was on the Falling Sand Game forums,
One or two years ago.
Some one had posted a forum about a "falling sand game" with realistic fire, explosions, and electronics.
A link was provided.
And well, i got hooked! :D
By the way it was the version with all the old elements
I love powder toy. Is mah baby

Somewhere around 2 or 3 years ago. Back when there were only, like, 4 elements and 3 walls.

i've always known about it, even before its creation.(which is to say that i forgot)