Sorry to hear that RC - get a photo up and post it to all of the Audi forums/pages on Facebook and Twitter. I've seen a few cars spotted very soon after.
If you point me to it I'll share it on work pages too (Audi related).
Another example of if you own a desirable Audi you need to consider relocating or disabling the OCD port, fitting a steering lock and generally making it look like a PITA to steal!