happened to be in the area today, so here's an updated view of the 18th and May corner from Berwyn Frank's postcard....that postcard view was from the 2nd floor window of the building at the SW corner...I was standing directly below that window.
<a href="http://www.flickr.com/photos/[email protected]
/4417457965/" title="18th and May, Pilsen, Chicago ...2010 by captain54_01, on Flickr"><img src="http://farm5.static.flickr.com/4016/4417457965_55e55c9778_b.jpg" width="1024" height="768" alt="18th and May, Pilsen, Chicago ...2010" /></a>
the property @ 1134 W 18th (which in the old photo has a white awning) is now Ciao Amore restaurant. The property @ 1132 W 18th, or where the first carriage from the left sits in the postcard is now Imperial Spa...both of these building are from roughly 1889.
the buildings to the east (1130-26) that were the Czech Benevolent Society are gone, but a building @ 1130 W 18th was constructed in 1989. It was a clothing store and now seems unoccupied.
the building @ 1124 W 18th was also razed, so the next available searchable address is 1122 W 18th, or the red building that has the "injured" billboard on its side...the first building mentioned in this thread is directly across the street from this building
so basically, the three white buildings in the center of the postcard view have been razed.