While the PSPgo sales have been lagging due to it's price tag, Amazon is set to kick things up a notch with their latest promo... 

Buy a PSP go, Get a $20.00 Credit Towards a PSP PlayStation Network Game!

Buy a PSP go by October 27, 2009 and you'll receive a $20.00 credit good toward a PlayStation Portable game from the Amazon PlayStation Network store.

Limit one credit per household. Offer valid from 12:00 AM Pacific Time on 10/17/09 to 11:59 PM Pacific Time on 10/27/09.

Check it out:  Amazon PSPgo Promo