Rumour: PSP Euro Launch May Be Delayed To September

PSP Gamesindustry.biz report that game publisher sources believe the PSP launch in Europe could be pushed back to September.
There has been no official date announced by Sony since it went beyond its original planned launch in March:

It’s now widely believed that June is the earliest possible date for the system to arrive – but comments from two senior sources close to the development of titles for the PSP have suggested that Sony may be considering slipping the system past summer entirely.

Our sources have suggested that Sony is planning to announce the European launch date for the console at E3, which takes place in late May – and would indeed leave the company on a tight schedule to get the console out in June.
European PSP launch may be delayed to September