All-City is one of the house brands of QBP. They make track bikes, and parts for track bikes. Its managed by Jeff, a dude who rides bikes a lot and is pretty much super nice. The big block frames are their basic 4130 all purpose track bike. More photos at the All-City flickr page, more info at the All-City Cycles blog.
“The Big Block track frameset represents our vision of the ideal track frame for the modern fixed gear rider. This is the bike that we’ve always dreamed of building and we are proud to make that dream available to you.”
Its pretty tight. Come through to check them out in person. See the other All-City frame, the Dropout, at our 2009 Interbike summary post.