Hey impulse buyers, want a PSP Go? Amazon is offering a $50 PSN card for anyone who picks up the portable tonight, in black or white. Seeing as you'll be having to spend that much on digital titles anyway, it's a pretty good long-term $50 discount, bringing the suggested value of the Go to about $195. It's still not as financially sound an option as a PSP-3000, but if you value style over price figures and disc-based media, this might be one of the best incentives before Christmas. Offer ends at midnight PT / 3:00AM ET -- after that, it turns right back into a pumpkin.