[twitter-dev] Are twitter api statuses/public_timeline and statuses/user_timeline method unavailable?

Are twitter api statuses/public_timeline and statuses/user_timeline method unavailable? what's the relationship between statuses method and the new Streaming API? I'm so puzzled.Anybody help? Thank you!

[twitter-dev] Filter.json (Follow parameter acts unexpectidly)

This may seem like a stupid question, but I've looked all over the documentation and I couldn't find an answer. I was under the impression that I could receive asynchronous notifications of tweets made by a user by making an oath signed http request to