I can't believe I didn't make this connection before (and feel free to laugh if I'm the only one who didn’t realize), but I think I get some of the changes from the last corporate presentation and why MS6 achievement obviated MS5.

Have a look at the most recent milestone chart:

Notice that all of the electonic milestones have been accomplished!

The remaining ones, including MS5 are all optical (the final MS being the combination of both).

Recall that none of us had ever heard of "PET" before the current corporate overview. But POET can improve upon CMOS without any of the optical components. Maybe this is an example of what solesius was saying about improved performance in one area of a system without concurrent improvements in others. At this stage, perhaps POET is better implemented using the electronic capabilities and then gradually integrating the optical components.

Other things that got sewn together in this theory is that Benadiba was heard to say (I think to Iamsorry) that POET is ready to go *now*, which seems impossible given the remaining milestones. Also, Lee Shepherd likes the complementary HFETs even more than the laser. Certainly the electronic aspects of POET . . . er . . . PET has applications that will attract buyers as the final MS are bing completed.

For this reason I think PET was conceived to encapsulate the electronic devices on a POET chip, and I think development of PET is actually complete and ready to sell and license!