On: Meet the IOIO - USB breakout board for android w/48 digital+analog IO pins

[TillE]

Pick any USB Ethernet adapter supported by Linux, and it should be fairly easy to get it working on your rooted phone.

Here's some code showing how to mess with networking on Android: http://code.google.com/p/android-wifi-tether/

[JonnieCache → TillE]

Unfortunately not. Android devices are not yet capable of acting reliably as USB hosts. This means you cannot connect peripheral devices to them.

The IOIO works by acting as a USB host itself.

[ck2 → JonnieCache]

I've seen android prototype devices by vendors for demos and they have ethernet ports. But I guess that's not a usb interface either, it's native.