Apple’s iPhone and RIM’s BlackBerry might have all the developer attention, but there are still a lot of people who love their Sidekicks. T-Mobile is going to introduce their new Sidekick LX on May 13. I like what this device has to offer: It integrates Facebook, MySpace and Twitter. This is a smart move, for T-Mobile says nearly two-third of the web traffic generated by the Sidekick web browser goes to social networking, to the tune of 15 million requests a day. Social networking apps are proving to be big catalysts for consumer web usage, in turn helping to boost the data revenues for mobile carriers. The iPhone, BlackBerry and ground-breaking phone startup INQ1 have all seen big bumps from social networking sites. Microsoft (s msft) bought Danger, maker of the Sidekick, in February 2008, so it makes perfect sense that the device will support Exchange and Exchange Active Sync support.