This is the most detailed and authoritative prediction of what Martti Ahtisaari is going to say about Kosovo's status that I have seen. It's by Tim Judah and has lots of detail about the UN procedures involved in changing Kosovo's status, but also lots about the uncertainty about what is actually going to happen. And that's without factoring in what might happen in Serbia after the election.
The source is Balkan Insight, (BIRN, Balkan Investigative Reporting Network) a website dedicated to "reporting the Balkans on its path to Europe", which I haven't seen before. Looks a well presented website with email newsletter subscriptions and RSS. They are also offering a documentary film on Kosovo's final status, called "Does anyone have a plan?" Seems a pretty apt title.