Over at Toms Hardware AMD's Sempron Takes on Intel's Celeron Value Challenge

"AthlonXP To Be Phased Out. As soon as Sempron will hit the market, the lower and middle class AthlonXP models will immediately be phased out. The first victims of AMD's new course will be all models up to 2500+. ...in the third week of August..."

So if you you have 133 mhz FSB socket a main boards, like me. I have 8 of them. Now is the time to get those XP2400+.