Better security is on its way from Twitter. The guys over there have begun a count down clock heading towards 30 June 2010.
What will happen that day you ask?
On June 30, 2010 (9 weeks and 3 days from now), the @twitterapi team will be shutting off basic authentication on the Twitter API — you can see the announcement here. This has been previously announced. All applications, by this date, need to switch to using OAuth. Don’t fret! @twitterapi is here to help! Feel free to reach out to us directly, or via our Twitter Development Talk group.
There is apparently one exception that was posted on the Twitter API Google Groups page by Raffi Krikorian:
I was just reminded about a point of clarification – streaming API will still support basic auth. This note *only* pertains to the REST API.
You can see the active clock yourself at http://www.countdowntooauth.com/