I still have several CDs from looong ago by the Circle of Dust/Brainchild/Argyle Park family. Still like to give them a spin every now and then. I'm an old guy now, so I have to be in the proper mood to really "get" it when I play them.
I wasn't yet into Industrial when they were all in their heyday, but at least I did find out about Circle of Dust first. Even if only slightly; I think the sequence of events went like this, if I recall correctly:
*I have an initial interest in Industrial (ca. 2000, 2001), even though I was somewhat familiar with the genre name from looking at Columbia House catalogs.
*My cousin, who was into a lot of the intense stuff (we're talking Mortification here), let me know about Klank (around Easter, 2001)
*Found the Circle of Dust website by way of the Klank website, and by that time it was directing to the Celldweller EP material (mid 2001)
*The rest of the groups/projects - Argyle Park, Level, AP2, and so on - I only started hearing when I was directed to Flaming Fish and found ChristianIndustrial.net (2004/2005), which also led to lots of the others like Under Midnight, Dead Artist Syndrome, The Last Dance, The Awakening, Aleixa, and Autumn's Descent.