We were told to expect Advanced Remote Play functionality in today's big PS3 update (version 1.6). Looks like we were played the fool: you will not be able to access your PS3's content from any wi-fi point: once again, you must be in wireless range of your PS3. Until they correct this, the Remote Play functionality loses a lot of its purpose: what's the point of being tethered so close to the system?Update 1: It looks like Sony has delivered, but in a very unreliable fashion. Personal tests show that a "PS3 is not detected" error message is given more often than not. A variety of factors may be causing this glitch: firstly, your PS3 may lose its internet connection, especially if it's not wired. Secondly, Folding@home seemingly activates even when your PS3 is in Remote Play mode, which can cause some glitches. Personally, I've been able to successfully connect to my PS3 from an external wi-fi source less than 1 in 10 times. We shall investigate further.
There are some additional improvements made in this firmware revision, but they are very subtle. You'll be able to easily register a PSP for Remote Play use by accessing Remote Play from System Settings on PS3. Also, you'll be able to connect a wi-fi bridge to 20GB PS3s, allowing them to interface with PSP like the 60GB versions do.