It looks like Russell took the plunge and installed the v.2.0 PSP Update. Evidently, even though it is the Japanese version of the firmware, it works fine on the U.S. PSPs.
Keep in mind that if you are interested in running any homebrew, then you do not want to install this update, as homebrew currently only runs on v.1.50 or younger firmware. Fortunately, I have 2 PSPs: one slightly broken unit that I’ve been hacking away at and one pristine newer one. I’m going to wait until the end of the day and see if an official U.S. version of the firmware is released, and then, either way, I’m going to update the non-hacked PSP to version 2.0 firmware. I’ll keep the other slightly hacked PSP for homebrew.
UPDATE: Okay, so I didn’t wait until the end of the day. It works. h00t!