Will the new 4870 X2 require a..

No, you can use any board with a PCIe 2.0 slot (and most likely 1.0)

The 4870X2 has a chip on board that acts as a sort of bridge between the 2 GPUs, taking the crossfire requirement off the motherboard.

true

Part of the upgrade to PCIE 2.0 was more power through the slot. I'm not so sure that a PCIE 1.0 slot would be able to power that card based on power reqirements I've seen from a few reviews. Anyone is welcome to correct me if I'm wrong, I'm tired and don't feel like looking up how much power each version draws from the board/PCIE power connectors.

I heard the final version of 4870X2 required watercooling

no one would buy 4870X2 if it REQUIRES watercooling.. ATI is going into the wrong direction.

Crossfire doesn't need a chipset made by the video card's maker, unlike SLi. It works fine on Intel's dual-slot chipsets, and with some hacks, I've seen people even get it to work on nVidia's SLi chipsets. (so would you call it SLi with Radeon cards? )

However, the X2 cards do not require such a chipset; it's designed so that under normal functioning, it behaves as a single video card, and that's what the chipset sees. It doesn't need multi-card support to use it.

As for power and cooling, I heard that it'll require an 8-pin plus a 6-pin connector if you're using it on a PCI-e 1.0 slot; the original 4870 could almost run with just a single 6-pin connector, so the 4870X2 likely wouldn't consume above 90 watts more power than its single-GPU sibling. Similarly, if it's burning less than 250 watts, then there are already coolers that could handle it.

Oh, and if I were a mod, I would've just gone around banning every poster from my ancestral homeland on a whim.

Simple solution for concrum, just ignore him and mod all his posts down so they disappear.