USBAdb is direct copy of the ADB USB test code from Google Android.
Source Code is available online: http://developer.android.com/resources/samples/USB/AdbTest/index.html
For some tablets, you can use the USB host to communicate with external devices, and with this application, you can connect your android devices to your tablet and start checking the logs (i.e. adb logcat).
Host Devices Tested: - Asus Transformer TF101. (with USB kit)
More Information: http://www.bitartist.org/2011/12/android-usb-host-testing.html
Does not have shell
A Google User
Amazing Application The only thing I wish is that it launched an adb shell rather then just adb logcat.