Rumblings in the world of social networking this week with news in that Facebook is suing Power.com, a Brazilian start-up that lets users access a number of social networks through one portal.

Power.com signs users into their various social networks and messaging clients and delivers the data from those sites and services to one page.

For example, you can see all of your friends, their status updates, visit their profile pages, and even send a message to multiple friends on multiple social networks–all in one place.

Last month, Webware editor Rafe Needleman described it as Meebo for social networks, and it’s obviously a big convenience for people who have profiles and friends spread across Facebook, MySpace, Orkut, Hi5, and the AOL, Yahoo, and MSN instant messaging clients.

But Facebook would rather users go through them. It has requested that Power.com use Facebook Connect instead of asking users for their log-in information and has been in discussions with the start-up for a month, according to The New York Times. The Times however reports the two failed to come to any resolution, and so Facebook decided to file suit. Power removed access to Facebook after the claim was filed.

Facebook filed a lawsuit on Tuesday in U.S. District Court in San Jose, Calif., for copyright and trademark infringement; unlawful competition; and violation of the Digital Millennium Copyright Act, CAN-SPAM Act, and the Computer Fraud and Abuse Act, among other charges.