I work in a hospital and I was in the cafeteria when I saw someone with a Focus...I just had to speak to her about it. Seems that her husband is a mod over at another site - can't remember the name - if I see her again I will get the site.
I will say this - while I dont see other Windows Phones while I'm on the subway, I always get the iPhone user who will stare to the point of leaning over while I use my Focus. I always make sure to hit the People hub and the Xbox hub, then I use some of the really visually stunning apps like IMDb, Amazon Kindle, the updated foursquare app, Prime TV, and the coup de grace: Cocktail Flow. Oh, and I make sure that glorious S-AMOLED screen is set to max brightness and I 'innocently' tap on the lockscreen to activate the transparent lockscreeen image I use.