Intel's Virtualization Technology (better known as Vanderpool) is expected to be available in the fourth quarter of this year.
The first CPUs with this new virtualization technology will be the Pentium 4 662 and 672, respectively clocked at 3.6GHz and 3.8GHz.
In Q1 2006 the company will launch its first 65nm single-core Cedar Mill processors with clock speeds ranging from 3GHz to 3.8GHz. Models with xx1 model numbers won't feature VT while processors with a xx3 model number will feature the Virtualization technology. But it is expected that only the 3GHz model will lack VT functionality.
Fortunately the current Intel 945 and 955 chipsets will feature support for these new processors so normally you won't be required to buy a new motherboard.
Competitor AMD will likely introduce its Pacifica virtualization technology in the first half of next year, toghether with the switch to DDR2 memory.