Final Fantasy fighter is having a one-day sale at amazon.com today. The online retailer is taking 30% off the retail price, removing the much-hated "Square Enix" tax. You'll be able to pick up the UMD for $28, including free shipping (with no sales tax, for most).
Of course, because this sale is only for the UMD version, those of you that purchased a PSP Go today will be out of luck. Hopefully, Sony keeps an eye on these sales and makes PSN versions competitive during their weekly Thursday updates.