I just got the DLNA feature working between my Galaxy Tab and my Windows 7 Home Premium machine. It was kind of tricky until I figured out what the problem was. I could see my Windows 7 PC as a media server just fine, but it had no content, although the library on the PC had lots of content. After checking that the media sharing/streaming options in Windows 7 was all enabled an all devices where allowed to pull content from the PC I tried to disjoin from the Windows 7 HomeGroup, which I don’t use for anything anyway – and after then again enabling the media sharing on the PC, I could see all the different content and also play it on the Galaxy Tab.