Chilly Willy updated his PSP Doom port:

Changes:

Fixed problem with strafing and turning at the same time.
Big cleanup of the controller handling code in general.
Added ability to disable the analog stick and to calibrate it.
Added two forms of cheats.
If there is no default settings file, or if the default doesn’t specify the main WAD file, it now tries to set the main WAD to the shareware WAD (idiot compensator).

http://groups.google.com/group/chilly-willys-ice-flow/web/doom-for-the-psp?hl=en