AppleInsider now has an <article> stating that the (aforementioned) "Optimus" will be used in future MacBook Pro models. (Future???)

Also included are several paragraphs (all generously sprinkled with hyperlinks to previous Insider articles) outlining Apple's recent GPU decision-making (OpenCL), as well as a brief overview of the ongoing legal spat between nVidia and Intel.

Hard to say how this latest news bodes with respect to the (expected) imminent MBP release. [gawd i hope this wait is worth it -- Apple's affinity for secrecy and surprises is getting hard to stomach.]