Augmented Reality using markers

Looking into using augmented reality with markers. I want to attach a 2D/3D image to a marker of my choice. Anyone have examples or tips (or pretty much anything to offer)? I've been looking for a decent example, but at this point I'd accept any help at all. I haven't found a single example using AR, but not using geolocation. Not concerned where I'm at, but what I'm looking at.

Or am I out of luck at the moment with Titanium?

I'm afraid this is not possible with Ti.

But you could try to make a custom module and share it with the community :)

what about arTi ?

http://developer.appcelerator.com/blog/2011/02/arti-source-code-released.html

Not quite what I'm looking for. Basically I would be trying to project a circle every time I see lets say something like this:

http://i.imgur.com/ABENN.jpg

I need to tell the phone what image to look for and then when it sees it to project the circle.

I've spent close to twenty hours researching ways to do this, but all I've managed is how to do it on desktop apps which doesn't interest me at the moment. To be honest I'm fairly sure this isn't available yet with Titanium, but I don't like the other tools out there. If I knew Titanium was capable of this then I'd have no problem signing up with a membership to get help from the Titanium support staff.