MediaPost reports that despite the rise of Facebook, MySpace.com continued to record year-over-year growth of 4% as of February when it attracted 55.4 million unique visitors, according to new Nielsen Online data. That means it keeps its top spot on the desktop, mirroring its performance on the mobile side. Some more statistics, quoted from the report:

- Facebook's usership grew by a stunning 102% to just over 20 million unique visitors last month.

- LinkedIn grew an impressive 271% to 7.4 million unique visitors in Feb. 2008.

- Club Penguin, Disney's virtual network for kids, grew 46% to about 4.7 million unique visitors in February.

- Windows Live Spaces, meanwhile, was down 15% to about 7.9 million unique visitors in February.