This process is tested on my AC100 running Froyo Android 2.2. The page will get updated with links to the required software later. This guide is not nearly complete, use at own risk. If someone knows how, it is possible to make a update.zip. This would make it as easy as "put zip on SD, reboot and load recovery, reboot and login to google account, start Market"

To get a working copy of Android Market, it is possible to copy some progress made on the Toshiba Folio and Elocity A7 tablets, wich are similar to the AC100's hardware.

Currently you need:
adb from the google sdk
USB driver from the sdk
USB hack to enable tegra support
SuperOneClick root tool (only works until next reboot)

Google apps mdpi for tegra from cyanogenmod
wpa_supplicant from elocity (folio version might also work, but untested) It is important to change permissions on this file

Once adb and the usb driver is up and running, connect the ac100 to your computer. Use SuperOneClick psneuter to initiate "shell root"
enter the ac100 with
"adb shell"
mount the /system partition with
"mount -o remount,rw -t ext2 <insert_partition> /system" <-Will get updated later with correct partition
"exit"

Create a zipfile containing Vending.apk, Google<something>framework.apk, Talk.apk, GoogleContactsSyncAdapter.apk, MarketUpdater.apk and wpa_supplicant
"adb push zipfile.zip /storage"
"adb shell"
"cd /storage"
"unzip zipfile.zip -d /system/app"

On the AC100, disable wifi
back on the commandline:
"cd /system/bin"
cp wpa_supplicant /storage
cd /system/app
cp wpa_supplicant /system/bin
cd /system/bin
chmod 755 wpa_supplicant

On the AC100, enable wifi, if it works then you might be ready to try to logon to the google market. If wifi doesn't work, then there is a permissions problem
Note, the wpa_supplicant from elocity will not show your current wifi signal once you're connected to a wifi network.

This is all for now, I will complete this guide on a later date.