According to X-bit Labs the Intel Prescott CPU will be launched on the 2nd of February, 2004. On that day Intel is going to announce 7 new desktop processors, including 4 Prescott CPUs with 1MB L2 cache running at 3.40GHz, 3.20GHz, 3.00GHz and 2.80GHz. All of these have an 800MHz FSB, SSE3 and Hyper-threading ofcourse.
The Intel Pentium 4 Extreme Editition at 3.40GHz is also planned for that date, just like a normal Pentium 4 Northwood clocked at 3.40GHz. Also a new Prescott product with 533MHz FSB; the Pentium 4 2.80A which is based on the Prescott core with 1MB cache and SSE3 but it does not support Hyper-Threading.