I don't think he was disowned by the beeb as he still has a blog on their website
http://www.bbc.co.uk/blogs/adamcurtis
It is a very good blog and one of the few places on the internet I have ever witnessed a civil intelligent conversation taking place without trolls / fools ruining it. The most recent post about systems that humans have created to prevent change taking place in the world is quite interesting. It mentions a investment computer programme that manages 11 trillion worth of shares by analysing the past 50 years and then invested in a way that maintains maximum stability. I hope that thing is in Faraday cage
He is also in the process of making a new multi part documentary for the BBC
Some of his stuff is on this site
http://thoughtmaybe.com/?s=adam+curtis