1) Do you plan to convert to the new edition of D&D?
No, not initially. It may take a couple years or more for my group to convert. Although, this may change, because of the quality of the Pathfinder product. If I like the 4e rules (which I think will) and I have an excellent 4e Pathfinder Adventure Path, then I will probably try to talk my group into switching to 4e.
I guess the short answer is "I go where Paizo goes."
2) If Paizo converts its RPG products to 4.0, how will that affect your purchasing patterns for our products?
I will still subscribe to Pathfinder. I enjoy reading these even if I'm not playing 4e. I have so many 3e adventures to run through already, that I can keep my group busy for years before needing to use Paizo 4e adventures. Plus, I haven't bought the Gamemastery adventures yet.
3) If Paizo does not convert its RPG products to 4.0, how will that affect your purchasing patterns for our products?
As long as it stays compatible with either 3.5e or 4e, I'll keep subscribing to Pathfinder. If the system would change to something else, I would have to reconsider my subscription.