USB hub that supports iPad charging & synching

Are there any USB hubs that support charging "and" synching with the iPad 4th Generation or iPad Mini? I use a MacBook Air as my desktop to drive an LED Cinema Display and with only two USB ports, and I need two more. I have an old Belkin hub that obviously will not work. My Time Machine USB drive demands a direct computer USB port, as does the iPad. My iPhone 4S works (most of the time) on the old hub, but sometimes not. Surely there is an solution to this dilemma? At worst I'll have to use WiFi Sync and just keep the iPad charged with it's own charger though WiFi sync will likely be much slower than USB? Thanks for any suggestions.