It looks like once Sprint XOHM and Clearwire merge to become the new MEGA-Clearwire, Comcast has plans to release mobile WiMax-based femtocells in the second half of 2009. The devices will act to expand coverage throughout the home while routing VoIP calls over the traditional Comcast network. While Comcast PR says "we're not commenting," it's believed that the cable giant currently has a request-for-trial (RFT) issued to the femtocell vendor community. Comcast, an investor in the new Clearwire, hopes to bundle wireless broadband service with VoIP, TV and cable broadband -- an idea CEO Brian Roberts wasn't originally keen on.