PSPKVM is a Java 2 Micro Edition (J2ME) CLDC/MIDP Emulator for the Sony PSP.

Changes:

Initial MP3 (JSR 135 Multimedia API) implementation added. This is a MediaEngine (hardware-based) implementation–very fast, and easy on your processor. It is for file-based playback only as of this release (no streaming from the net as yet), and has the following known limitations: there are no shuttle controls or volume control, metadata reading is not yet supported, and backgrounded playback, while functional, will break your network connection.
Added a ‘mark all contents’ command to AMS folders

http://sourceforge.net/apps/trac/pspkvm/wiki/TestBuilds