I've tried to find this out but haven't tripped over the answer yet. I am curious how much RAM the Merom based systems will be able to address. Will it be more than the current 2GB?
The same as the current systems if the 945GM chipset doesn't change. 4 or 8GB if the chipset moves to the 965GM. If you want more, you will need a Mac Pro which can get at least 32GB right now, since the XServe seems to support that.