If you're a Basecamp user living in the Chicago or NYC areas, and if you have an interesting story to tell about the way you and your organization use Basecamp, then 37signals wants to talk to you. They're looking to shoot a series of interviews which will be promoted on the 37signals site, discussing how exactly you use Backpack. Who exactly are they looking for? Well:

"We're looking for customers from all walks of life and all industries. From educators to designers to writers to marketers to performers to lawyers to anyone who considers Basecamp an integral part of their business."

If you're interested, their blog post has the original announcement and contact information. No deadline for these interviews has been set.