Hi, Amazon are stocking the latest 120GB model CECH-2103A, check the 120GB console and find the discussion called "Is amazon selling the lates ps3 slim model number CECH-2100?" - someone ordered one the other day and confirmed it. I suspect it should be the same newer model for the 250GB console.
My got YLOD on December 25th 2009 but I ended up paying Sony for the refurbished model 60GB and the fans a lot louder on this lol. I think it's about to die again. I hear Sony are bringing out two new PS3's in July? There's two unknown PS3 Slims listed on Wikipedia so I'm waiting to see before I buy and there have been rumours.