Damn, I just played with some AR technology and I will definately make a lib for this.
I played a small pong game and drew some 3d models.
So awesome. I would probably need you though Jim as you seem to be good with Models and OpenGL.
Do you have skype?
Add me Xverhelstx
I played around with the andAR examples. They work quite well (although the updating is a little slow)
Regarding OpenGL object rendering, I am not sure what coordinate system AR uses, but for positioning the object all I would need are OpenGL world coordinates (x,y,z). The rotation values would also be required (pitch,yaw,roll)