One of the reasons for the delay is because Intel doesn't want to confuse the world and their dog with all the next-generation introductions.
As we've said before the Merom T7400 and the T7600 will support iAMD64, and Intel is preparing Crestline chipsets using ICH8M enhanced for a business platform, Santa Rosa launch, in the first half of next year. These will come with "Kedron" 802.11n, a, b, and g Wireless LAN, and another type known as Nineveh LAN.
In all, there will be four Merom SKUs when it launches - the T7600, T7400, T7200 and T5600. The last is a single core. For some notebooks it's hoping to offer Meroms which will have battery lives of over five hours. Clock speeds 2.33GHz, 2.16GHz, 2GHz and 183GHz - bus speeds 667MHz, cache 4MB, 4MB, 4MB and 2MB. Cash $640, $420, $295, $240. Intel will also offer Merom based Celeron Ms in 2007 - at least three SKUs, as well as a value ULV chip with a Merom core.