Best launcher is always subjective. There is another thread right now discussing ADW. Launcher Pro and VTL also seem to be popular. I believe you should be able to connect external storage. You just need a micro usb to female usb adapter to plug the usb device into. It most likely will not also power any external device such as a hub or coffee heater or anything crazy like that.
as you know HC 3.2 update is available... so do u think that 3.2 supports an external device "by default" ???? and according to you it means connecting an external device to our tab depends on the launcher we use right??