Just downloaded it for the iPad. It looks great, one small suggestion for improvement, at least in my opinion, the scrolling is really slow. If you get a thread with a lot of pictures, prepare for a finger workout.
Some may argue that an iPad version isnt necessary being you can access the full website on it. However, the iPad's forum cookies sucks ass. Even without exiting the internet, many many times it will make threads I've already viewed, even already replied in, unread again when there is nothing new in them. That gets very frustrating, and it happens on every forum I view. Its to the point where I dont go on forums on my iPad unless Im away traveling somewhere without my laptop (like I was in Orlando recently).
So, just my thoughts, an iPad app would be better than surfing the forums on Safari.