Airfix stock is slowly starting to become available in the UK. There was recently a post on the UK based Airfix tribute forum http://airfixtributeforum.myfastforum.org/airfix_resupplies_about4715.html to the effect that supplies are slowly starting to appear again.
Guess that it might take the rest of the World a bit longer......
There is also another thread, hidden away in the Clubs & Chat section of the forum that is only visible to forum members. It was posted in March as a result of the site owner having a question & answer session with the Airfix Marketing Manager. The Nimrod is expected in November & there are a few other snippets of future plans.
As for the Airfix Web Site. It isn't fully back yet. All that there is http://www.airfix.com/? where you can register to receive news of the relaunch.