I'm experimenting with DLNA servers.
Nero Mediaserver wouldn't work streaming in realtime on my system (Athlon 64 3200+), so I tried TVersity. I installed that, but the PS3 can't detect it no matter what I do.
Nero Mediaserver is now proving to be buggy...it crashes constantly, at least on Vista (32-bit). Now when I try to start it up, it tells me that a component is missing and I've got to reinstall. Bizarre.
TVersity works quite well for me (XP MCE'05), also allows for setting the maximum target resolution for transcoded streams, which is quite a nice feature when bandwidth is limited (in WLANs). However, sometimes the PS3 cannot detect the files anymore and i have to restart the streaming server on my PC (Core Duo 2300).
Haven't tried Nero much, it's ok though for streaming low bitrate mpgs, but fails to transcode anything for me (possibly because of missing MPEG4 encoder...).