updated my NTV300sl as soon as i connected it to my network (it asks during setup). Widi did not work, ended up updating the widi application software from version 1.x to 3.0 with the download from the intel website. Also found this on the Netgear website:
NeoTV Intel WiDi channel is compatible with Intel WiDi 2.0 based software. The latest verified Intel WiDi software is version 3.1.29.0. Intel WiDi 3.0 based software such as version 3.5.x.x will support by later FW upgrade release
Anyway, the widi works great now.