The funny thing is, as long as Barton price is below $100, it is above any competition. Look, the P4 2.4 Ghz is $125 and this is the cheapest Intel part that performs competitively. The Celeron 2.8 is $98, but it has much worse price/performance that P4.
In the $60 land, you can have Celeron 2.2 or Athlon 2400 (it's not Barton, actually). Every schoolboy knows which is faster of those two.
The most desired Barton part is mobile 2500 for $90. This part will kick out any Celeron in performance and almost any Intel cpu in history in price/performance.
And AMD has already Sempron ready, well before Athlon XP runs out of steam.