I am sure you can find a USB hub that will provide the appropriate power.
Maybe, but I doubt it. Not consumer level models, just the 16-port or higher "carts" for schools or whatever. You made me curious enough to search a little, let's see:
- Newer Tech. Claims 2.1a capability, but actually only one port supports a 10" tab.
- This one is 8 ports, so I was slightly off. But I can't seem to find a date. Betting it is more $$$ than the Griffin, as it appears to fall in the more industrial-level "cart" group.
- Here is one for 2 devices in a car. That's a start. But one review claims it can't even handle charging one Galaxy Tab when the Tab is on. I'll bet it's not actually better than my dual-car-charger that only claims to provide for one large tablet. Unless it's one of those designed-for-Apple issues and is only providing the Samsung .5a. You'd think there would be a home version, maybe I missed it.
- I have some no name wall-wart-style charger with 4 USBs from Amazon, which claims to handle 2 iPads, but reviews say it burns out charging 2 iPads or 4 phones. I've only used it for up to 3 smaller devices to avoid burning it out. (didn't bother with a link)
- I've looked through a few wall receptacles, too. But they all seem to stop at 2.1a total rating, not each port. Example.
- Here's a power strip with 4 USB. Still only one 2.1a.
I would love to see one, don't get me wrong. But all these companies have pretty clearly relied on the standard USB spec of .5a. Remember when PCs were shipping with ports that couldn't even supply that? And people couldn't charge their smartphones well. I think the Griffin is the first.
For the Griffin that is the topic, I'd be interested if it was about $60 max, with some cables. Even if the cables weren't exactly what I needed, at least they'd be trying.
For my house, we've gotten the kids 7" tabs, so I don't really need 2.1a for every slot in a multi-port charger, but the typical .5a isn't really enough, either.