Hey, is it just me, or isn't this java moss? http://www.blackjungle.com/Merchant2/merchant.mv?Screen=PROD&Store_Code=BJTS&Product_Code=LTM
I have some java moss growing in my substrate that looks just like this. I think you could easily spread out a clump from an aquarium and have a 10" x 10" carpet in 2 months. I have so much of it that I have to constantly thin it out.