According to the firm comScore, in May, there’s a new king in the social-networking arena and it appears to be Facebook. comScore reports that Facebook has momentarily surpassed rival MySpace in global unique visitors for the first time. ComScore representatives said that Facebook’s lead began in April, when the site passed MySpace by a hair, and widened in May.

Facebook, according to comScore, pulled in 123.9 million unique visitors in the month of May, beating MySpace’s 114.6 million, and 50.6 billion page views, compared to MySpace’s 45.4 billion.

Facebook has gaining more popularity than rival MySpace as each day passed in 2008, and now it’s the new king. Though, it was a slow upward battle to take over the number one spot, it succeeded.

Facebook was founded by then-Harvard undergraduate Mark Zuckerberg in 2004. The site was initially restricted to members with email addresses from a handful of elite universities, before gradually expanding to the general public and becoming a genuine Silicon Valley sensation when it kick-started the developer platform craze last year.

What social network do you use?