Ouch. with a background in electronics, I never trusted/ or tried the third party cards. I was always more worried about frying the machine than losing a save though, spread the word on the generic hardware...
As far as recovery, If you or someone you know has a sony card, try the garage trade with the offending device in slot 2 after loading the sony card save from slot one. It will cost you, but if it is one of those prize cars that you can rarely win, it might be worth it. My friend C. will never learn, and he lost all of his cars on the original GT. He is currently running (you guessed it) an interact card on his PS2. so far he has been OK but he has to put in the memory card CD before the card will work. I can recommend this card for archiving game saves you never play, but other that; avoid it...