Nonetheless, given the poor performance of Barcelona chips compared to Nehalem and Penryn, these chips at 1.9 - 2.3 GHz will be less than useless. Considering the highest clocked Phenom goes to 2.6GHz (and beyond with overclocking) its a bit of a mystery why these chips are clocked so low.
Even if they are aimed at a low market segment, it really wont hurt AMD to squeeze a bit of performance out of them. Its only a different multiplier as far as they are concerned, but better performance for the end user. With only 2 cores, its power draw and heat dissipation should be a lot less than Phenom chips.