FUD Zilla has info on Intel's Havendale plans. These are the Nehalem processors with integrated graphics and according to the site you'll have to wait for these chips until Q3 2009. The cheapest Havendale chips will cost $90 while the most expensive part will have a sub-$279 price tag.
This implies that there will be at least six different frequencies for this dual core, Nehalem based CPU but we heavily suspect that graphics will be the same in each and every one of them. At the same time there might be some difference in features and frequencies of the IGP core integrated on Havendale but we are quite sure that the hardware part will remain the same.
This is a quite aggressive strategy and we can expect to see mobile based IGP on CPU from Intel roughly at the same time.