Can I push media to the ScreenBeam receiver using DLNA?

No. The ScreenBeam is not a DLNA media receiver. DLNA stands for (Digital Living Network Alliance). The Digital Living Network Alliance is a non-profit trade organization, and it was started by Sony way back in 2003. The DLNA defines standards that enable devices to share photos, video, music with each other, and it has more than 200 members responsible for more than 9,000 different DLNA devices.

DLNA is designed to act as a bridge between your various devices, so you can watch a film from your PC on your big-screen TV, play an MP3 from your smartphone on your stereo, or send shots from the family photo album to your wireless printer via your tablet. Think of it as a kind of home cloud, it shouldn't matter where your media is or what device you're currently holding with DLNA, whatever you want should come to wherever you are and whatever you're using.