Rooting allows you do much more with your Android tablet, such as running overclocking apps; better customization and so on. Today, someone at archosfans.com has root the Archos Arnova 8 G2 tablet. He achieved this by making a custom firmware that not only brings you root, but also Android market. Follow these steps to root it.
Installing the ROM is pretty simple. Connect your tablet using a USB charging cable and fully charge it. Download this zip file and unzip it. You will find a file called update.img in it. Copy this to the root of your tablet.
Remove the USB cable. You will now receive a message as shown in the following screenshot. Tap install and follow the steps given on the screen.