No, the 90nm Opteron is the "San Diego", it has 1MB L2. The Venice only has 512KB of L2 cache, and yes its the successor of Winchester.
The price of these chips is astronomical, it about equals the FX price. The 152 Opteron (one way), is gonna cost $637 for 1k units, that means over $700 for the regular buyer most likely... The article also states the dual cores are scheduled for "mid-2005", not end of it, which is good news as well.
Other than that, it is good that we got confirmation that AMD has got this chip out the door, and is starting to mass produce it.