For everyone else, I went around and tried to get the position of some of the better known/more prolific RPG publishers out there and their position on adapting either the GSL or the Pathfinder License. It was a mixed bag, but most of the publishers I contacted were really helpful and polite.
-Goodman Games is already publishing under the GSL. They declined all comment on Pathfinder.
-Adamant Entertainment reiterated they've been supporting 4e without signing onto the GSL. With the release of both the Pathfinder license and the GSL, they're working with their lawyer to determine the best way forward.
-The Le Games (they of the Unorthodox line) issued this official statement when I emailed them:
"The Le Games does not intend on signing the GSL. We simply don't feel that there is enough of a market for it as a third party publisher (at this time), and 3.5e OGL sales are still doing quite well. The distributors and retailers we spoke to made it clear that 4e sales have been very much below expectations. And frankly, the GSL is still too restrictive from a creativity standpoint. However, The Le Games is not opposed to experimenting with some 4e compatible books in the future without the use of the GSL, and we reserve the right to change our minds in the future should market conditions change. As for Pathfinder, we are still considering this as a possibility for our company and hope to have an official statement in the coming weeks".
-For Alderac, John Zinser was really nice in his response. He basically stated AEG is going to "stay in Switzerland" when it comes to the current 4e/Pathfinder split. He went on to say "We have friends on both sides of the fence and can see good in both products. Our focus will remain on L5R Role and Keep products and an occasional book like the Ultimate Toolbox. If we decide to do games in need of a game system we will cross that bridge when we get to it".
-Paradigm Concepts has no plans to sign with Pathfinder at this time, according to President Henry Lopez. It looks like their Living Arcanis campaign remains 3.5.
So that answers (or at least updates the status on) some of the publishers I've heard folks asking about. One thing to remember is these licenses just came out, so I'm sure we'll see additional reactions in the days and weeks to come.