One of the small changes noticed in the Gold Master build of iOS 4.2 for iPad is the addition of a volume control in the Multitasking Bar. So now the far left end of the bar offers an orientation lock toggle (which was much better as a hardware button), brightness control, and iPod basic and volume controls.
So … now we have two controls that were / are far easier to get to via the hardware buttons along the top right of the iPad housed in the Multitasking Bar, and an added volume control. Why??? Why not leave the bloody orientation lock and volume controls alone and add some useful services toggles to the bar? Toggles for WiFi, Cellular Data (on the 3G model), and Bluetooth, would be far more useful and would be logical to place next to the brightness control, as all these influence battery life.
Very odd decisions to duplicate controls that have hardware buttons already – unless this is an indicator that the next iPad model won’t have those buttons at all.