Well, good luck! I was never quite able to get java moss to do anything for me....... but then I never had Mr. Clean the incredible bristlenose pleco before, who I just noticed takes extra care to clean anything and everything off of my mosses... (he doesn't eat the mosses) so maybe this time they'll do something and turn out nice. If you treat that java fern right, it'll totally take over your 10 gallon. (or, well, really it'll take over anything short of a pond... but that's what pruning is for!)
Anyway, it'll look really fantastic in a few months! Be sure and keep us posted.