Sony quietly unveiled a new price drop on its PSP Go today, down to an MSRP of $149.99 from its previous price of $199.99. The new price slipped onto the official site, without an announcement to accompany it. Oddly, retailers don't seem to have gotten the memo yet, as most are still listing the old price.
This follows on the heels of a recent price drop on the standard PSP model to $129.99. That was a decrease of $40, so it makes sense that the PSP Go dropped $50 to match. Both seem to be preparing for the imminent launch of the Nintendo 3DS, and the eventual release of Sony's NGP.