Information has been provided by the OEM of what will be SLI notebooks (supposedly) concerning the horsepower behind these new rigs that will give notebooks another huge foot in as desktop replacements. Based on the Turion ML or MT, these little beasts will sport dual GeForce G70M "Ultra" independent GPU cards, equipped to function in SLI mode. 256MB of RAM on each card means it isn't a lightweight SLI, but something that will, based on previous GeForce Go performance, compete side by side with desktop cards.
It's expected that we'll see these come from retailers including Alienware and Falcon NW. Don't expect to be carrying these around much - at over 15 pounds, they are up the three times heavier than other notebooks available. None of this is completely substantiated, but it is very exciting nevertheless.