The only current chipset to support Conroe is the i975X Intel chipset.
The future chipsets will start with the Q963, Q965, P965, G965.
I haven't memorized all the features yet. 8O
But I do know the Q series will be part of the Stable Image Platform Program (ie. for businesses), the P965 will likely be the mainstream enthusiast, and the G965 will have integrated graphics.
A extreme series chipset has not been announced yet to replaced i975X, although those chipsets will have newer features and southbridges.