How can I use Unity Android in an Android Application view sub section?

How would I go about using unity android in an existing android application? I want to be able to render unity as a small subsection of the screen area.

Are there any issues that I should be aware of doing this?

I have created a basic guide on how to go about setting this up:

http://forum.unity3d.com/threads/98315-Using-Unity-Android-In-a-Sub-View

This will hopefully be eventually added to the official documentation.

Known issues:

The unity player cannot be terminated or it will stop the whole application. You have to pause the unity player and hide it. Then when you want it back you will have to unpause it and bring it back into focus.

The solution referred to does not work. The directions are missing several steps, and if people follow the steps provided the old NativeActivity gets launched (as the manifest still calls this out) and not the new activity.

This makes you think you are successful, but in reality the new activity is never getting launched.