Putting up an interesting post about Twitter mobile usage, the microblogging site’s chief executive Evan Williams disclosed on Tuesday that his service currently has 145 million registered accounts and nearly 300,000 apps using its open API.

While News Corp. is still in the process of securing a new search advertising pact for its social networking website MySpace.com, sources ‘in the know’ have shared the information that the company’s search ad contract with Google has been extended by one month.

According to the most recent statistics put forth by Pew Research, the use of social networks - like Facebook, Twitter and LikedIn – for users above the age of 50 years has increased two times over the last year or so.

According to a recent report from tech focused site Redmond Pie, citing one of the latest posts on the Facebook Developer Blog, there are currently more than 100 million active monthly users of the Facebook application for iPhone.

With facebook becoming the most popular social networking site, its biggest competitor Orkut is also buckling up its shoes swiftly. As it has introduced new features in its site that gives the users more control over data sharing.

Close on the heels of Microsoft’s last-week launch of a beta version of Windows Live Messenger that integrates with Facebook Chat, the social networking site recently announced that it soon intends ending Internet Explorer 6 support (IE6) for Chat.