EarthLink has been laying low since its Philly-wide WiFi project failed all those years ago, but now it's back in the limelight with Clearwire's 4G network under-arm. The companies have struck a deal for EarthLink to access Clearwire's WiMAX infrastructure, initially to offer wireless, in-home broadband. This is expected to launch in early 2013, with mobile and small business markets being future goals. An LTE network is also in the