As you might have already heard, yesterday Sony has released ROM update 2.70 for the PSP and included in the update is Flash Player 6 - this is awesome news. The Flash Player 6 is enabled only through the web browser so in order to view SWF files they can be either embedded in HTML pages (just like desktop web pages) or just viewed as SWFs.

After you've downloaded and installed the ROM update (either download through the web or the PSP network update feature) you will be able to view SWF content.

If you're a developer interested in what features of Flash Player 6 are supported I've compiled an official list here (this information will be posted on the Adobe Mobile and Devices developer center in the near future).

/// Flash Player Version
(6,0,72,27)

/// Supported Input and Output
Mouse
Analog stick and the Enter button work as one-button mouse.
Pointer movement, click and drag & drop features are supported.
Keyboard
The directional keys work as the up, down, left, right cursor keys of a keyboard.
Character Input
Supports character input in the text boxes using the on-screen keyboard.
Font
Supports device font. The applicable scope of the font size and style are same as the Internet Browser.
Sound
Supports PCM, ADPCM and MP3 audio/sound playback for the speaker and headphone.

/// Unsupported Features
Clipboard
Text copy, cut and paste features are not supported.
Video
The playback of video data such as H.263, Sorenson Video or Motion JPEG is not supported.
Context menu
Context menu display, control or the features that are normally included in them are not supported.
Printing
Print out feature is not supported.
Live Connect
The communication feature between JavaScript and Flash Player plug-ins is not supported.
FCS/FMS (Flash Communication Server and Flash Media Server)
A connection to FCS/FMS, or features that requires it are not supported.
XMLSocket
Continuous connection and communication with the server using the XMLSocket feature is not supported.
Transparent background display
Displaying the background in transparent by specifying the wmode to “transparent” is not supported.

/// Known Issues
• Frame rate between 18-24 fps, depending on type of content.
• Large size Flash contents cannot be played. The size of the content in a page should be within 1.5 MB approximately.
• The timing for external file loading may be different from PCs. Load completion must be confirmed.
• The device font has 5 sizes, same as the Internet Browser. The layout used for PCs may not be available.
• The mouseout event may not occur when the pointer gets out of the content if objects are arranged on the edge of the content field.
• Restrictions when deep nesting occurs with ActionScript are different from PCs.

On your PSP you can take a look at a FPS speedometer Richard Leggett put on his web site to get a better idea of how Flash content will perform.

If you have any questions about the Flash Player 6 for PSP you can post them in the Adobe Flash Handhelds Mobile and Devices forum.