Well, it was pretty inevitable that this would happen: The PSP Go drops to $150. When the PSP-3000 dropped, it just had to happen. There's no way that people would continue to buy the PSP Go at a $249.99 price point. Especially since people say that it was a failure to begin with and proved that people would still buy their products physically.
I mean, purchasing digitally has become the norm, especially with Xbox Live Arcade and the Playstation Network, but handheld gaming was not the way to go, not yet at least, in my opinion.
Although the price cut is official on Sony's website, it still hasn't taken effect in retailers just yet.