Three screws along the bottom, the one on the right had a black cap on it, four screws on the top, when it's open, two of them hold in the latch, look out for the wiring to the light, squeeze the connector to release it and there is the white container with the filter, right in front of you.
Don't remember how it opens, but I do remember it's simple.
Funny this came up. My Mo is in the shop again to take care of the "flat tire false alarms" and, like all dealers, when the car's ready to be picked up they call to sell you more stuff. This time, they tried to sell me the cabin filter when I had that done back in May before the cross country drive. They also offered up the power steering flush for $89.
So yes, you're right in that a lot of people should start looking for that filter. I think that's a 25,000 or 30,000 mile replacement thing. 36,218 right now. In the shop... again.