I read on Slashdot earlier about Intel releasing their new BTX form factor.
Anandtech.com has the full story (and pics). In short, the new BTX form factor allows for more efficient cooling of a computer's components. Whether or not this form factor will catch on remains to be seen. Of course, it's not up to you and I, the end user; it's more aimed at component designers and motherboard manufacturers. And with Intel's market-might, it almost goes without saying that the new standard will be accepted by board design teams.
The components that run most hot are situated in-line with the CPU cooling fan airflow, in order to take advantage of the air being moved. This is an interesting step which will cut down on the number of case fans needed in newer systems.
This is just a form factor, mind you, and not a chipset release, don't be looking for any new features or faster speeds. Those follow new chipset designs. BTX will merely allow for designers to build in a new way.