Sony's GC Press Event: Gran Turismo PSP free with registration of PSP Go in October  

More specifically, between October 1 and October 10. All you have to do is register your PSP Go and -- bam -- free download of Gran Turismo PSP.

This isn't just some measly demo, either. It's the whole shebang, baby.

The announcement was made during Sony's GamesCom press event.

More on the liveblog.