Just my two cents on a Numeria AP:
I realize sci-fi/fantasy mixes, as well as steampunk, are a mixed bag. Some gamers adore them; some despise them. I've bought every Pathfinder product outside of some of the stand-alone modules (though picked up a couple). Some of the adventure paths are clearly never going to be used in my campaign... most, in fact. Nonetheless, I enjoyed reading them and culling ideas from them piecemeal. I understand the aversion to a six month commitment to Numeria, but look at the popularity of the Warmachine/Hordes skirmish game (Iron Kingdoms d20 setting). Admittedly, steampunk and sci-fi aren't exactly the same thing, but it does often lead to the same arguments.
Most of us who ignored 4th edition D&D and followed Pathfinder like the variety of options 3rd party companies provided. Introducing regions like Numeria and Alkenstar obviously display some recognition of the steampunk and sci-fi/fantasy fan base. I'd be very disappointed if Paizo avoids publishing Numeria and Alkenstar content. Sure, I can adapt Iron Kingdoms sources (new books are in the works, but I have no idea if they'll be Pathfinder compatible or a 4th edition addon) or the different steampunk material floating around, but I value Paizo's balance and integration, which is why I buy 100% Paizo (and no WoTC) products since 4th edition rolled out.
Consider "Guide to" products for Alkenstar and Numeria even if a AP is out of the question. while the number of steampunk and sci-fi/fantasy fans might be less than the total body of Pathfinder players, they are a group pretty starved for publications they don't have to completely retool to whatever setting they're gaming in.
