I've recently bought an Archos 101 G9 Turbo (running ICS 4.03) with the intention of using it for work purposes to replace my slow Windoze netbook. The only shortcomming I though I would experience was having access to an ethernet port on the device.
I found an old USB LAN adapter that's been lying around in a drawer for a few years and out of curiosity. I thought it can't do much harm to try it. I plugged it in the the micro-usb port via a host cable and much to my surprise a grey Ethernet icon immediately popped up in the tablet's system tray. I plugged in an Ethernet cable from my network switch into the adapter and lo-and-behold it picked up an IP address via DHCP and connected to the net! No software, no configuration - true plug-and-play!
The Ethernet icon 'lights up' when connected so you can see it's good to go. The only thing I can't find is any configuration options under settings, so it looks like it might only work with DHCP and default settings (if anyone can throw any light on this It would be appreciated).
Even better, these things are still available and really cheap to buy, the host cable (micro USB male to USB A female) was GBP £1.99 and the USB ethernet adapters can still be bought for less that GBP £2.50 online. The USB ethernet adapters are available from the usual online sources. The one I have uses an SR9600 chipset if that's any help.
FWIW I've just tried this on my old Archos 7c G2 tablet running Froyo 2.3.3 and it doesn't work with that. I've tried it on a Samsung, Galaxy tab running Honeycomb 3.2 and this too doesn't recognize the device so I guess it's just ICS it works with.