Earlier this morning (in Malaysia) twitter announced that they were going to roll out a new version of its web interface. This means people who are using the web interface at twitter.com will see the difference while people who only depend on 3rd party applications will not. Not every account will get the new interface immediately and it might take a few weeks.
I complied a list of information about the new twitter.com that you might like.
I’ll start by giving you the official video of the new twitter.com