Hi, I've bought the Asus Transformer last week and bought the dock 5 days ago.
I did the 8 hour charge on both and the battery life was amazing. I used it pretty heavily and it lasted me until yesterday.
Yesterday, I charged my dock for the second time I had it until it was 100%, and then I left it plugged in for a while. The thing is, ever since then I've used it for an hour or so of fairly light use. Right now the battery level is 15%.
I first noticed that the battery died overnight by about 30% and continued to die, even when I didn't use it. I'm wondering if this is the same thing others are experiencing or not. I just don't get why it was amazing the first charge and now it's draining too fast.
Latest Asus Updates on both tablet and dock, too.