No problem...had to go through the process myself recently. So this is the best answers I could come up with, which in the end was not an iPad, but I was after the USB's to be quite honest. Trading was a secondary consideration for the tablet as that is done remotely anyway.
I work offshore and with the USB's I can watch movies in my bunk. I copy them over to my desktop from the external and when I watched them delete them. Tablet is nice and small to watch, don't have to drag a large laptop around. 6 hour battery time on movies, can watch 2 without re-charging. At home it has a MDI plug so I use it to stream Aljazera to my big screen.
All the tablet has to do for me trading wise is control the remote server and it does that perfectly.
I don't think tablets are quite where they should be, battery life to short, storage to small, just not enough number crunching power, but the next generation will definitively be perfect for the mobile trader. Nother say 2 to 3 years before you have a business in your pocket, so to speak.