I must say that I really like my Go. The only crap thing about it is that it looks itself into one user account, so you you have to reactivate it if you want to play Grandia from the JP PS Store, and then you have to reactivate it again on the PS3 if you want to play Gran Turismo.
Other than that I would say that it is extremely portable and I can actually bring it everywhere in my pocket (versus the 2000 which you basically had to have in a bag or something). The bluetooth stuff also works great, tried skype with a headset and network tethering. Both work without any problems whatsoever on the PSP part. And GT had a Nissan Primera (my current car) and a late 80's Toyota Celica (my previous car)!
Other than that I would say that it is extremely portable and I can actually bring it everywhere in my pocket (versus the 2000 which you basically had to have in a bag or something). The bluetooth stuff also works great, tried skype with a headset and network tethering. Both work without any problems whatsoever on the PSP part. And GT had a Nissan Primera (my current car) and a late 80's Toyota Celica (my previous car)!