Matt Farrow has launched a new website with a project he has called PSPEmu and he claims that it will be a PSP emulator for the PC and Xbox ( i doubt a Xbox can emulate a PSP at any stage of the game)
Heres what he claims will be the features:
+Stable PSP Firmware Emulation
+Laptop/Tablet PC Battery Support
+2.0 Web Browser Emulation
+Runs PBP Files(Homebrew)
+ISO Support(Not At Full Speed)
+WiFi Support
+Theme Setup
+Wallpaper Customisation
+MP3 and MPEG Support
+Full Screen Mode
+Reset,State Save and Power Off.
+Home Button Support(Includes Home Confirmation Screen)
+UMD Emulation(.umd files - new file type)*
+XBOX Version - (Limitations - No WiFi or ISO Support)
+Linux Version
+Windows And Mac Versions
+PSP Drive Emulation (PSP/GAME/ etc.)
+Extended 3D Rom Support
+New Project Name:PSPemu (Xbox: PSPemuX)
This does seem rather dubious especially Xbox Emulation but you can check the site out here --> http://mattfazzer.bl.am/ and report back with your own conclusions.
Hopefully Matt will come and visit us and explain how he plans to get a 333mhx system emulated by a 700MHz Xbox, We shall watch this closely