Update just went live. Btw, it's a pretty good one
Optimization for bigger screens
and even a sharper icon (I was always a bit annoyed that their icon seemed blurry). They added a concept art gallery as well showing some of the cool character artwork from in the game (I personally like the samurai art - my favorite unit). They also said they rebalanced some maps but I wouldn't know what those are.
This is probably one of my favorite ipod games because of my love for feudal Japan and the awesome fight mechanics/animations.
It says they've fixed it to make it load faster but in fact I think the game is loading much slower...