Reston, Va. - Some of the top Internet brands, including Google (NASD: GOOG), Facebook, Wikipedia and Craigslist, were among the biggest gainers last year in terms of their Internet audiences, according to a new report from comScore (NASD: SCOR).

Social networking giant Facebook reaped the benefits of opening registration to all users, jumping 81% compared with the previous year to 34.7 million visitors in December.

Wikipedia gained 34% to reach nearly 52 million visitors, continuing its reign as the Web's most popular reference hub, while classifieds site Craigslist.org jumped 74% (24.5 million).

AT&T (NYSE: T) grew 27% (30.2 million), boosted by its exclusive deal with Apple as carrier for the iPhone, and Yellow Book Network jumped 137% (10.4 million).

Several of the top-gaining properties were driven by their acquisitions of other Web properties, including Everyday Health, which gained 349% after its acquisition of Drugs.com and other sites, and Glam Media, which grew 213% due in large part to its addition of Quality Health Network, MyYearbook.com and LifeScript.com.

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http://www.comscore.com/press/release.asp?press=2043