It seems I've been driving the Allante less and less in an effort to prevent this from happening. But after the return trip from last Saturday's cruise night, I found my odometer reading 89999 while pulling on to my street.
I made a quick loop through the neighborhood to get it to read 90K, took a few pictures, and pulled into the garage.
The car looks great for being so old; everything is working perfectly (except the radio which just crapped out on me). I'm a very prowd owner.