If this blog is your first exposure to the concept of a new edition, I would suggest doing these things (perhaps in this order):
• Read the Pathfinder Playtest page, and make sure you watch the video near the top.
• Read the FAQ linked at the bottom of that page.
• Engage! Join us on the Pathfinder Playtest messageboards. Tell us what you think. Ask questions. We can't answer every possible question you might have, but we need to know what's important to you, so we can make the game you want to play.
• Keep an eye on the blogs at the bottom of the playtest page; we'll be adding more content regularly.
I have been a Pathfinder Lurker for about six and a half years. By that I mean I was drawn in by the Golarion setting through the Pathfinder Comics, and ended up picking up various Pathfinder books and products over the year, but I've only played the game twice so far.
I'm following your blueprint for what to read so far (about to head over to the messageboards), and will keep tabs on the goings on for the next few months to see if 1) this is a good jumping on point for me to actually start playing, 2) this is the perfect jumping off point like I always say whenever Marvel or DC do a company-wide reboot every five years, or 3) if I should just continue loving the Golarion setting stuff into this edition.
I guess I've got my eye on how you treat the transition in the setting.