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The Barnes & Noble NOOK HD+ is a tablet with a 9 inch, 1920 x 1080 pixel display, a 1.5 GHz TI OMAP 4470 dual core CPU, and up to 16GB of storage. It runs a custom version of Google Android 4.0 designed to work with B&N’s book and app stores.

And if that isn’t good enough for you, now you can boot CyanogenMod 10 from an SD card to get the full Android experience on Barnes & Noble’s $269 tablet.

Independent developer verygreen has been working on the project for the past month. Now he’s released the first unofficial build of CyanogenMod 10 for the NOOK HD+.

In a post at the xda-developers forum, verygreen describes how to build the software yourself from source code. Or you can just download a snapshot build from December 6th.

From there, you’ll need to follow verygreen’s instructions for preparing an SD card with ClockworkMod Recovery, which allows you to boot the tablet into a custom recovery — and from there you can install CyanogenMod 10.

Since CyanogenMod is installed on the SD card, all you need to do to return to the stock B&N software is turn off the tablet, remove the card, and turn the tablet back on again.

The software is still a work in progress, and there may be some bugs. For instance, Bluetooth doesn’t work yet. But audio and video work, and there appears to be hardware graphics acceleration.

Update: Bluetooth is now working, but audio over Bluetooth doesn’t work very well.

You should also note that this software is designed for the 9 inch NOOK HD+, not the 7 inch NOOK HD tablet.