Dutch Social Network Hyves has developed into one of the biggest and mos popular Social Networks in a very short time. Hyves has over 3 million members as of last week. The site, and the company show they make the necessary efforts to give the users what they want. Only a month after having won an award, Hyves started offering mobile connections : For every message Hyves users receive, the first eight words are sent to your mobile as an sms.
In short, Hyves is a winner. They might not be the biggest, they might not be the first, as others also offer mobile extensions, but at least they're innovative. Check 'm out.