Well done twhite, you've waited long enough and quite rightly advised others not to give up the fight for what is right.
I believe you should be back paid to the 14th week of your claim. (@ The difference between assessment rate and I guess WRAG?)
As the JCP are usually very slow to respond to successful appeals and backdating I would make copies of the tribunal decision and forward it to your local paying office, which may speed up the process.
As snowman recommends, try and relax a little as its been a long haul.