The original Atom is going to its retirement. Intel has informed its partners on few occasions that it wants to retire the old Atoms and this finally happens in Q2 2010.
As of end of this month Intel won't be selling Atom 330 and 230 parts and we hope that you have enough of them in stock for maintenance and other kind of support.
Naturally Atom D425 and D525 and a bit older and DDR2 supporting D410 and D510 will be there to continue the Atom legacy.
Atom D525 and D425 should remain the fastest Atoms at least until Q4 2010 when they might be replaced with some faster iterations of the same CPU. This is yet to be announced but we would not be surprised as the real 32nm atom successor only comes in late 2011.