C2DM with ClientLogin deprecated

Question

Now that ClientLogin authentication has expired, should we use OAuth 2.0 for C2DM messaging?

My application is a C # web application that should send messages to registered devices. Any example, how to get Auth token using OAuth for C2dm messaging? What type of authentication do I need to use (installed applications, web server ...)?

Edited Jun 28, 2012

C2DM is deprecated. Developers are encouraged to switch to GCM, C2DM will be supported for a short time. Simple API instead of ClientLogin and oAuth2, which are not supported. http://developer.android.com/guide/google/gcm/index.html

Answer 1

Android C2DM still requires login authorization. oAuth 2.0 is not available for C2DM, but thus implements Client Login. Since Warpzit claims that Google’s obsolescence policy states that it doesn’t apply to experimental features, and the device messaging cloud is still considered to be in the “labs” state.

Answer 2

Discussed here: C2DM with PHP using OAuth2.0 (ClientLogin is deprecated!)

I would suggest that since the Android C2DM is still part of the lab (which means experimental), it still starts the clientlogin and will not expire any time soon. A snippet from an obsolete policy reads:

This deprecation policy does not apply to versions, features, and functionality designated as "experimental."

But since it's still experimental, we all have a much more serious problem, will Google completely pull the plug on C2DM?