The NewerTech 7-port USB 2.0 powered hub ($28) offers 4.0 Amps, delivering a full-powered solution for most users. It's an absolutely standard-looking hub, and its big feature is its dedicated high-powered charging port, built for both iPhones and iPads.
I plugged my aging first-gen iPad in the NewerTech hub and it had no problems charging up, even after I connected a bunch of other items to the other available ports. NewerTech's offering seemed to be better built than the cheap no-name seven-port hubs you normally find on Amazon, and the iPad-friendly super-port is a nice feature to have.