People can use it by tweaking a file embedded in Facebook for i Phone.
According to Mashable the preview are look like these photos...
But wait!!!!something went wrong looks like Facebook got a hint of it's hacked app so they are rolling back their support for it.According to the Techcrunch people are getting turned away from their very log in page .So,no donuts for them.But lets hope that this will boost up their relies of the app..