Word has it none will ever get one, it's owned by quattro GmbH rather than VAG as a group - so I think they'll just use it for their RS cars. Weird set up, I know.
The work was sub-contracted out to Quattro as they operate like an external business. This doesnt mean Audi have exclusive claim to the engine. The development was 'paid for' by the VW group. As has been pointed out, it's based on the 2.5 block from the states, which comes in a... Golf. I've heard from friends on the inside that it's a case of never say never. MkVII R is possibility.
As for Ed35 - no suprises really. Just a 'special-ish' GTI, just like the Ed30. If you want show with your go, buy an R.