That's further than I got.....my phone never even asked me about the xbox.
The connection is there with my phone. I can actually delete the allowed device and do everything over again and it will always ask me to allow the Xbox. But when I click allow, nothing happens. There are not many options on the S3 for DLNA. It's pretty much on or off and that's about it, so it's not like I have a setting wrong or something. At least not an obvious setting.