As long as we're guessing at possible candidates for the PR firm, here's my guess.  My list is considerably shorter.  My conclusion is based being located in San Francisco and the past client list, as well as advertised services.  

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K/F Communications

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Remember this from Fairchij notes from the meeting?

"Thirdly how are we going to get the story out? We were in San Francisco; we are hiring a PR firm in San Francisco that is strictly to do with Silicon Valley types of investors and companies. Deals only with them. They are fantastic; they are going to position us with the leading companies. And line up the dates. I did not clearly hear or get the intent of his next line but I think he was saying that this PR firm will make it known to each of these companies that POET is being presented to all the main players. They have a tremendous institutional following. They are going to put us in front of institutions and funds in the US which we have never had. We will finally be able to tell the story to the funds, we have the time to do it since we have jettisoned out of solar, and we have the people to tell the story properly in front of them."

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Check out the client list from the other San Francisco firms.  This one fits best in my opinion.

I don't have any inside knowledge, just a guess.

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Green