At 
Sprint also released a 4G developer guide that includes sample apps and source code for forward-facing camera, HDMI output and network detection (3G, 4G, Wi-Fi).
“The EVO 4G experience is much like going from TV to HDTV. But EVO has more than just an impressive list of features — it is also fun to use with remarkable gaming, video and web-browsing capabilities,” said Dan Hesse, Sprint CEO.
Commercial release of the HTC EVO 4G is slated for June 4, 2010.
http://www.google.com
http://www.sprint.com