If you are running Windows Vista you have a very simple way to enable the sharing through Windows Media Player 11. So far we found a reasonably good solution only for Windows OSes, so I'll start with it. DLNA is an open protocol based on UPnP (Universal Plug and Play) and therefore can work on any operating system. Your options for the software naturally depends on your operating system. The latter is most interesting for majority of us, since DLNA certified CE equipment is not that widespread yet. What it means is that you have to have a DLNA server installed, either hardware (like some HDD storages, DVRs or set-top boxes) or as a software on your PC. (Remote connect to PSP is using proprietary protocols)
PS3 takes a role of DLNA Player, not DLNA server, so it can play a content of any DLNA server (source) in you digital home, but can not stream the content to other players within DLNA protocols.
As of FW1.80, DLNA is supported by Playstation 3 entertainment system.
DLNA is an industry standard for media (audio,video, photo) sharing within concept of a digital home and is supported by many hardware and software manufacturers.