This is one of the Chinese-made Section 1 tablets. Possibly somewhat hackable. I have one of the resistive-touch ones, branded as a "Nationite MIDnite". Sadly, dysfunctional. One of the firmware updates "bricked" it.
Has some specifications, alas relatively little else.
On Installing Angstrom Linux on A81E
Angstrom is one of the interesting embedded Linux distributions.
Here are some links less specific to the A81 unit:
Using Android ADB.
Documents process set up for Augen tablets, but this evidently works fine on A81.
Obtain ChainsDD/xinx's Superuser.apk/su , and get the appropriate version (Eclair=Android 2.1, Froyo=Android 2.2).
Unzip update.zip on your computer (or on the tablet)
Run the following from your computer (or from a terminal on the tablet, in which case one may omit the adb bits):