Yes, Twitter changed their authentication in September. From what I have seen it has not had any impact on the streaming API.
I will update the adapter to work with oAuth later if needed and publish on CodePlex.
Note however that this adapter is for educational purposes only and not designed for a production environment.
Zeev Kazhdan (9/29/2010)
Before I will test it, I have a query, please:
I understood from Twitter that they have just changed (September 2010) their authentication flow to use oAuth authentication method (it points to Oauth Authentication Flow ver. 1.0a)
Will your solution work under this new oAuth flow?