Weirdly, or not, have not seen another reader in the wild, though I'm not hanging out with other geeks much, and don't go into Starbucks, or public transport... but given I'm in the Los Angeles area, mostly the two big valley... I'd expect to see something somewhere.
My local friends are still very... "you'll have to pry real books from my cold dead fingers" and don't get that use a reader for a bit, and that's what you start saying about the reader... On line friends have them, but I never see them
When I'm out, I do get some interesting folks that want to look and play w/ my reader... and more than once someone who's commented, rather surprised that "I'm just reading it like a book", are more surprised when I say "I am. It is."
Then again... the San Gabriel Valley has always felt about a decade behind the real world, so maybe I shouldn't be surprised. (Apologies to anyone voluntary living there.)
Maybe someday I won't be alone here.
-Cat-