First of all, I really should should get a nick change
Second, check this post for new test versions:
http://xdaforums.com/showpost.php?p=33733620&postcount=326
To get a bit more into detail in reply to shirazdindar;
1. The DriveLink app has several restrictions, the only one I've removed is the contious resurfacing of the app. With the normal version, as soon as you start another app, Drive Link puts itself to the foreground. That behaviour is removed, but several other restrictions are still there. As there's a workaround for the most annoying one (Home button not working), I'm not spending too much attention to this for now.
2. DriveLink is working on CM10 without adjustments, but TMServerApp.apk not. This app delivers the mirrorlink interface with the head unit. In "the other thread" you can download some test versions. Specifically named test version, because I cannot verify if they're working. I don't have a MirrorLink head unit and not planning to buy one in the near future. The "development" and testing procedure are basically trial and error so I have to rely on Sony/Alpine owners to test and provide useful feedback. If we get TMServer running on CM10 for the S3, testing must be done with other devices. Some devices might work, some won't.
3. Will be relevant as soon as 2 is solved. I think we shouldn't elaborate too much on this at the moment. In the testing process for CM10 we will run into this key-pairing and then we'll see if it can be bypassed or not. Nokia devices aren't really interesting from my point of view, however progress may take a leap when Xperia devices or firmware with MirrorLink support will be released.