Monday, Sept 10th, 2007 if the release date is correct.
Here is some Article Reading Homework for you guys to look at on the new AMD Quad Core Barcelona chip. It's the first true Quad core chip on one die (Intel's Quad core is two Dual Cores together on one die). Should make things interesting.
Supposed release date is Monday, Sept 10th, 2007 which is tomorrow.
AMD Opteron 2300 Series
Model / Core Frequency / TDP / Launch Price
2350 / 2.0 GHz / 95W / $372
2347 / 1.9 GHz / 95W / $312
2347 HE / 1.9 GHz / 68W / $372
2346 HE / 1.8 GHz / 68W / $251
2344 HE / 1.7 GHz / 68W / $206
Don't worry about the AMD Opteron 8300 Series
Unless you run web servers and the such. Not for home use.