This is from Eco-artware--read about it here (actually, it was by 2nd Hand Made, and published in the Eco-artware newsletter). Eco-artware is a fun source for products made from old bike chains, typewriter keys, etc. The instructions for this floor runner are no longer on a link through this site, but I think it's probably made like this.
Here's another option with neckties.
This is actually an art piece by Sandy Voss.
Towels! Another source of material for rugs (in addition to neckties, pantyhose, fabric scraps including thrifted sheets, etc) is towels. Instructions for braided towel rugs here.
If you think braided or crochet rugs aren't contemporary enough to suit your style, there are lots of designs available. This sunflower is from Leisure Arts Leaflet 2820 (1996)
"Rags to Rugs Book 2".