Same issue, I have spent nearly £50k on Alfas in the last 3 years and I get no more information than you.
The registration site from 3 years or so back, well I cant remember how many times I enrolled for info
The person in the dealership responsible for all things 4C who promised me to let me have any details she had
Does not seem to be UK typical really. More like typical of big dealerships.
Registration : exactly same here. This is just a hole in the ground I think.
Reminds me of "Lost"
Previous dealer told me when asking for a rebate : "why would I, you are an Alfa nut, you will buy Alfa anyway". It which point I stood up and drove to the VW dealer and bought a Golf diesel.
Which did not work out for me that well, but that's another story
Next dealer sold me a 2 Alfas after that. Asked when they could let me know more about the 4C.
They responded : "he will be in Geneva, you can go there". Which sounded very much like "***** off you can't afford that car".
I then found out some months later via an Alfa forum they had had "an exclusive pre-launch" with a 4C in their showroom, without inviting me, of course.
I got so fed up I drove over to the small Alfa dealer nearby, told them : "I want to buy a 4C. All I need to know is it is delivered in 2014". We signed the agreement, I did not have to pay anything and I have been treated like a good friend ever since.