I guess it's a new CPU, just like the dv2z series seems to be a new one, isn't it?
The old series was called dv2-1050eg (or such)
It's just interesting to see that hp already has knowledge about the new CPUs AMD hasn't officially released yet.
So according to them there'll be:
AMD Athlon(TM) Neo X2 Dual-Core L335 Processor (1.6GHz, 512KB L2 Cache)
AMD Turion(TM) Neo X2 Dual-Core Mobile L625 Processor (1.6GHz, 1MB L2 Cache)
The old Neo used to be a single-core CPU. The new ones have 2 cores. The difference between them both is obviously the size of the L2 Cache.