I just switched to that theme today!
It was already on my phone when I got it (which was yesterday, lol), but I think it was because mine came preinstalled from T-Mobile with the 126.96.36.1999 OS already on it. I am using a 7105T, but I like this theme much better than the T-Mobile theme! Plus, it looks like the 8700 series phone now, lol!
Does anyone know if this theme comes with the 188.8.131.529 upgrade, or am I just really lucky to already have it on my phone?