I give remote play a 3.0 out of 5...WHY???Because you can play ps1 games while using remote play,you can send messages to PSN buddies...On the other hand,you cannot use ps2 games,you cannot join chats,and most importantly you cannot change settings or users.PAGE IS STILL CURRENTLY UNDER CONSTRUCTION

Remote Play is a feature on the Playstation 3 and Playstation Portable which allows a Playstation Portable user to interact with their Playstation 3's Xross Media Bar. Users can access music, videos and games and various programs stored on the Playstation 3's HDD, external flash drive, or optical media. Remote Play works by encoding a video and audio stream (most likely AVC and AAC) of the output image on a PlayStation 3 then delivering it over a network (via TCP port 9293) to a PlayStation Portable. Actions performed on the PSP such as the pressing of buttons are uploaded back to the PlayStation 3 over the same connection. This is similar in concept to the Slingbox. The latest update includes the ability to use the feature across the internet, turn your Playstation 3 on remotely, use a few applications, and play all Playstation 1 games, whether stored on the HDD or on an optical disc.
Sony is allowing developers to let their games on the PlayStation 3 interact with the PSP. So far Sony Computer Entertainment has only announced two titles that will work together with Remote Play[4]. Gran Turismo HD and Formula One Championship Edition have been shown at E3 with the PlayStation Portable acting in-game as a rear view mirror to assist the player in the game[5]. The Remote Play feature was dropped from both games before release and did not appear in the final version of the game, however during the next firmware update it has been announced that such remote play is ready to be activated. Soon after its release, the PlayStation 3 title Lair was found to work on the PlayStation Portable via remote play. The entire game is theoretically playable with no lagging (since the PlayStation 3 itself still processes the game, but the PSP displays it), however due to control problems many actions are difficult to use because the PSP lacks a right analog stick and the L2 and R2 buttons, all of which are necessary for playing the game. Although the PSP can be configured to use the Select button as a modifier key, such that Select+Joystick = Right Analog and Select+Left Shoulder = L2, such manual gymnastics are difficult to perform quickly, and preclude operation of both analog sticks simultaneously. Instead of using Sixaxis, Lair uses the joystick, making it easier to control your dragon. Although Sony have not announced it, with the current versions of the firmware for both the PSP and the PS3, Original PlayStation games can now be played through Remote Play to the PSP.[1][2]