Hey Nivanka,
I just found this and threw it on a test install. One feature enhancement might be to sanitize the twitter status. I.e. One of my twitter statuses includes an ampersand (&), which causes the Silverstripe TwitterPage to give an XMLParsingError page (the yellow error page).
At least I think that is why it gives me the XML error, it points to the space after the ampersand as where the error occurs.
Thanks!
EDIT: Another request. I'd like to be able to set up an RSS feed from the twitterpage. I'm looking into doing this, but am going very slowly. I'm hoping you might either be able to implement it very quickly, or give me some good clues how to get started. :)