Nice find, Donny. A few minutes googling gave the following information: He call himself Professor Edwardo Alvarado, is around 90 years old and plays on various subway stations in NYC. You can see a closeup of his keyboard in this video:
http://www.youtube.com/watch?v=1yJUl39ludQ

It looks like a Casio to me. In some of the other videos on YouTube he also plays a Yamaha. See more here:
http://www.youtube.com/results?search_query=Edwardo+Alvarado&search_type=&aq=f

and some great photos here:
http://www.flickr.com/search/?q=Edwardo%20Alvarado&w=all&s=int&referer_searched=1

I really like the contrast to the professional made poster hanging behind him.

Kind regards,
Tommy