social media - Import tweets from Twitter

Robert Raguet-Schofield in the Mathematica Blog introduced a way to import tweets from Twitter into Mathematica.

I attempted to use this method. I started with this line of code:

xml = Import["https://twitter.com/statuses/user_timeline.xml?screen_name=WolframResearch"]

and received this message:

FetchURL::httperr: The request to URL https://twitter.com/statuses/user_timeline.xml?screen_name=WolframResearch was not successful. The server returned the HTTP status code 404 ("Not Found").

Then I tried this

xml = Import["https://twitter.com/WolframResearch"]a

and this time I got some output. But when I continue the procedure to extract the tweets with this line

tweets = Cases[xml, XMLElement["text", _, {s_String}] :> s, ∞]

I get an empty set.

How can I import tweets into Mathematica in an effective way, given I am not a familiar with Apachi?