Intel's Core 2 Duo will arrive real soon but soon the company will also start shipping a new Pentium D stepping:
Thus far, there have been two shipping revisions of Presler, B1 and C1. The D0 stepping fixes a dozen or so errata from the C1 NetBurst processors introduced in February of this year, though there are still 30 official errata for 65nm Pentium D documented internally. The D0 revision will only affect the following processors:
Pentium D 915
Pentium D 925
Pentium D 945
Pentium D 950
Pentium D 960
