Iou1na
Damn, I typed that in caps, but it didn’t go through that way for some reason. Let me try again: IOU1NA.
I owe you one, North America? Am I missing something?
My favorite spotting so far is “IB6 UB9”
That would be " I woe you one, Narcotics Anonymous."
I wouldn’t call it great (more alarming, actually), but I recently saw a license plate that said “VIVISECT.”
Do a search here. There have been several threads on this topic.
Couple of favorites from the wilds of Oregon:
University of Oregon Track Coach Bill Bowerman : JOG 440
From an owner of a local grocery store on a 240Z (which gives you an idea of how long ago this was): RUNVS (Are you envious?)
HOOAH92
I thought, “Wow, I wonder if it’s Al Pacino!” But then I saw it was a Kansas plate. And then I wondered if maybe it was someone who worked on the movie. Or maybe someone who loved the movie a little too much.
I just met a landscaper who’s truck’s plate reads “mow money.” I also had the luck to drive past an old “Le Car” that had a plate reading “Le Plate”
XXIV CT AU
Priceless.
WRS
Didn’t we do this a couple of weeks ago?
ISU4U (lawyer)
a little old lady driving a huge car: NERVUS1
I have a friend who’s vanity plate is her name spelled backwards. It’s kind of fun cause if you do it right it sounds like a cross between a hiccup and a belch. 
4SDQPT9 on an early Chevy Impala SS - Got it in about 5 seconds - think Beach Boys
On a Cadilac in NY city: 1FASTMF It was tubbed and had a 647 cubic inch super charged engine so the cat was not kiddin’
An acquaintance drives a cherry red mustang which her husband bought for her.
IWHINED
I’ve seen NOSUP4U, obviously belonging to a Seinfeld fan.
And there was an old beater with the plate O4ABMW.
In Silicon Valley, on a Volkswagon Bug: FEATURE
Seen in a parking lot, a “Las Vegas” themed plate, here in Las Vegas, NV:
4QHEF
…I’d like to think the vehicle (a luxury SUV, IIRC) was owned by a (disgruntled) former model for or employee of Playboy Enterprises. But I’ll probably never know for sure.
I had a teacher that was on the cover of Car and Driver (or someother car mag) standing next to his little beater (don’t remember what car it was, but something very small), the plate read “COFFEN” (BTW his name was Mr. Coffen)
Someone I know that lives in Whitefish BAY, WI has plates that read “YAB OG” Doesn’t mean much unless she’s behind you and you see GO BAY in your rear view mirror.