Let the hive mind of Engadget get that for you.
"I finally got a new laptop with a lone USB 3.0 port. I'm now looking at getting a USB 3.0 hub with a power adapter so I can use both of my USB 3.0 hard drives at faster speeds. I've read lots of horror stories where some hubs either don't come with power adapters -- and as a consequence the portable drives don't work with them properly -- or they are designed poorly which results in USB 2.0 speeds. Or, the hard drives keep getting disconnected. Do your readers have any suggestions or experience using USB 3.0 hubs? Thanks!"
There appear to be more than just security updates in this release. I checked a bug that I knew about that related to the pages view in Safari and how it works when in landscape mode (if you opened a couple of sites in portait mode, then change to landscape, then hit the pages icon, the portait pages still show in portait orientation in the previews and you can't click the close icon). This bug is fixed! The Apple website talks about the security context of v1.0.1, but says nothing that would imply that this is the only content in v1.0.1. I would guess that they fixed a number of the easy things that caused the most common safari, maps and ipod crashes.
This update fixed the Wi-Fi issues I had been having at my home. Worth the update just for that.