Though recent high-profile media coverage suggests that a large percentage of the US population participates in online social networking and microblogging, more than half of Americans (51%) do not use Twitter or participate in either of the two largest social networking sites - MySpace and Facebook - according to (pdf) a recent Harris Poll from Harris Interactive.

...in one year there has been an increase of 20% of the volume of e-mail... about 4 million users check their e-mail from mobile devices... The mail service most used in Italy is Hotmail (40.7%), followed by Libero (35.7%), Alice-Tin.it-Virgilio, Yahoo! and Gmail (between 20 and 24% each).