Yes, This is old stuff. So old it was made in 1987 (I'm not joking) however since this is 2007, Speech techology has moved on infact if you have wifi you can browse the site below on your PSP and save your text to mp3! (Or wav i cant remember)
However if you don't have wifi and you really need your PSP to say something amusing then fear not! Amiga workbench has the tool for you!
Here are some fine masterpeaces i made for Noob2PSP...
Enjoy having fun with super low quality text to speech!
Can you guess what my PSP said?