I live in Portland too. I got my Aurora about six weeks ago, and just found this forum a few days ago. As rare as these cars are, there is another one (First Generation) that lives about half a mile from me (I'm SE, near the Johnson Creek FredMeyer). I couldn't help myself, actually knocked on the person's door just to tell her how beautiful the car is; she appreciated it, but it was clear that she didn't really understand just what she had sitting in her front yard. (I should show her this forum, huh?) There's another First Generation one that also lives SE, south of Hawthorne around 26th. Both are sort of a pink-champagne color. I've also seen one (it may be one of these two; I didn't think to look at the plates) parked downtown a number of times.
I had to go to Albany to get my car, and feel so lucky that it worked out - there just aren't that many out there!
Next time I see one (well, that's not entirely true, as I see the one down the block all the time, but that doesn't count), I guess the odds are pretty good that it might be yours.