Mark Gurman:

The iPad Camera Connection Kit’s USB adapter was built so users with USB cameras could plug their cameras in via USB on the go. Now they cannot anymore as most USB cameras require too much power from the iPad. This issue is unpleasant for photographers relying on the iPad to import and upload their photos on the fly.

I’m curious, which cameras (of what age, and make) have been crippled by the new power requirements set forth in iOS 4.2. That said, the ability to connect USB keyboards, microphones and flash drives has always been an added bonus.

Andy Ihnatko (April 2010):

That doesn’t mean that the iPad suddenly has a standard USB audio port. You’re limited to just the devices for which the iPad has built-in drivers. I suspect that the fact this is all evidence that internally, the iPad sees its stock keyboard and any dock sound devices as standard USB devices requiring nothing more than a basic driver. USB storage devices aren’t recognized by the iPad (except as sources of pictures and video, which is what God intended the Kit to serve). My mouse and my tablet didn’t do anything. And if anybody ever tried to create a printing app that exploited the Camera Kit and included drivers for HP, Epson, etc. I bet Apple wouldn’t approve it.