So I got the update yesterday and immediately wanted to see if I could stream photos, music, and video from my PC to my BDP-S570. I was already connected to my network by LAN connection (streaming movies from netflix worked better for me through LAN than through wi-fi). I am running windows 7 x64.... so I went to "homegroup and sharing connections" and checked the box to "stream my pictures, music, and videos to all devices on my network". From there I went to the Blu-Ray and selected "network settings", then "connection server settings", the list will be blank until you search for networks. Once you search, your network will show up...and that's it. You should notice a windows icon now when you scroll through the xmb menu for video...select the video you want to see and there it is (if you try and play videos while in the photos menu, it will tell you "no playable file found"... so make sure you are in the video menu to play videos, photo menu to play photos).
Now here is my problem...the windows icon shows up in the photo and video menu, but not audio....anyone have this problem? I'm about to call Sony to figure it out.